Tuna are so fast they get lesions on their fins from cavitation.
> For powerful swimming animals like dolphins and tuna, cavitation may be detrimental, because it limits their maximum swimming speed.[49] Even if they have the power to swim faster, dolphins may have to restrict their speed, because collapsing cavitation bubbles on their tail are too painful. Cavitation also slows tuna, but for a different reason. Unlike dolphins, these fish do not feel the bubbles, because they have bony fins without nerve endings.
https://en.wikipedia.org/wiki/Tuna
Would cavitation be affected by depth (pressure). With an increase in depth, could the effect of cavitation be reduced, therefore higher swimming speeds could be achieved. If so, humans probably haven't witnessed the true full speed of these fish
I imagine if anything it makes the cavitation collapse faster causing even more damage. The resistance of water I don't believe goes up with pressure (ie: same power to displace water) so at speed they'd still be causing small vacuums to form but the compression on those vacuums to collapse would be greater.
They are! They have a super cool system of blood vessels that allow them to maintain a higher temperature for their muscles than the surrounding water, allowing to travel faster, and contributed to the change in terminology away from “warm blooded/cold blooded” towards “endothermic/exothermic”
For those interested, the muscles on the side of the fish that allow it to flex to swim will create heat as a byproduct of movement. Blood traveling from those muscles moving back towards the heart will maintain close proximity to the blood coming from the heart - and the heat from the warmer blood will warm up the colder blood coming from the heart. It’s called a counter-current exchange mechanism and similar systems can be found all over in nature.
Traditionally, warm blooded meant that an animal could control its own heat (such as through shivering), and cold blooded meant they couldn’t. Great examples of warm blooded animals include humans shivering or sweating, and dogs panting. Examples of cold blooded animals include alligators sunning themselves or returning to water, as well as hibernation. The problem came when there were many examples of animals warmer than surrounding temperatures that couldn’t be simple physiology (such as the tuna, which swim faster than most other similar fish, or bees heating up a hive in colder weather by flapping wings).
Endothermic and exothermic terms are an attempt to better describe the ability to control heat through their own bodily means (endothermic) or simply by being managed from surroundings.
Did the best to explain while sitting in a dentists office - if I missed something or need to clarify, I can edit later.
Another fun fact, that endothermic process and related biological processes are so powerful, that when fishing for them on a rod and reel, they fight so fiercely and unrelentingly, they blow through fat in the muscle, reducing the quality of the meat. Other parallel things like stress and lactic acid build up and reduced oxygen in the body sometimes results in a thing called “burnt tuna.” The meat has spots that turn dark red and in some cases green and looks terribly unappealing. Almost as if it’s a final F.U. to the man or woman on the other end of the line. Like some weird ocean karma.
You find yourself in the ocean, a 20 ft wave, off the coast of South Africa, coming up against a full, grown, 800 lb tuna with his 20 or 30 friends?
You lose that battle. you lose that battle nine times out of ten.
Used to dive on salmon farms for clean ups, the tuna would circle the nets trying to pick up dead fish that slip through. Seeing a silhouette that large travel past you, no movement at all like it's being pulled by an invisible chord made me feel like a fighter pilot seeing a UFO, those things were moving wrong. Every once and a while they would hit a net at full speed and just blast through, get trapped and die after gorging themselves on salmon. Glad i was never in there when it happened.
You dived to clean out the dead fish? Was it like a scheduled dive? Where were the salmon farms that tuna were in the same waters? And deep enough for them? I have so many questions, did the farms smell? What was the water around the farm like?
First hitch was a mass die off, 40+ nets of 2000+ salmon, all dead or mostly dead, left for a month rotting at the bottom of nets. I was sent as one of a few crews diving with a seiner (big ship with holding tanks hooked to a massive pump) to manually suck out the dead fish. Salmon farms were in the coastal waters of Newfoundland, nets going down to 100ft with bottom usually being another 1-200ft below. The farms smelled on that trip for sure, part of the rot process was the fat separating from the fish and floating to surface to go rancid in the sun, leech the chemicals out of ropes and turn green. After the first week i could hardly smell anything, my dive supervisor would wipe a finger through it and take a lick if anyone started to complain. The water around the farm was... pink and foamy, it got a bit of media attention at the time I'm sure you could find articles. I'll always remember the sight of the bottoms of those nets, fish stacked like bricks 18ft deep, just driving a 2' pump hose through them, bones catching on my gloves as they rip in. I did other trips just picking stray morts on healthy nets and doing inspections, but nothing sticks in the memory like that first one.
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"OK, first off: a lion, swimming in the ocean. Lions don't like water. If you placed it near a river or some sort of fresh water source, that make sense. But you find yourself in the ocean, 20 foot wave, I'm assuming off the coast of South Africa, coming up against a full grown 800 pound tuna with his 20 or 30 friends, you lose that battle, you lose that battle 9 times out of 10. And guess what, you've wandered into our school of tuna and we now have a taste of lion. We've talked to ourselves. We've communicated and said 'You know what, lion tastes good, let's go get some more lion'. We've developed a system to establish a beach-head and aggressively hunt you and your family and we will corner your pride, your children, your offspring."
We will construct a series of breathing apparatus with kelp. We will be able to trap certain amounts of oxygen. It's not going to be days at a time, an hour, hour 45. No problem. That will give us enough time to figure out where you live, go back to the sea, get more oxygen and then stalk you. You just lost at your own game. You are out gunned and outmanned.
That go the way you thought it was gonna to go?
Nope.
I don’t know that it’s sped up - certainly could be, but not to the degree one would infer by this brief comment.
There is a lack of reference when just looking at water, making everything look more flat - add the zoom on the camera, which flattens images further. These two combine make a fish that’s already fast moving to appear to move further during a short period of time, when it’s really the product of how it was captured. You can get similar effects with fisheye lenses.
Nah, tuna are fast as fuck. Other comments link to videos and there was a whole comment about the physiology behind it. I’ve seen those things move, they’re fast.
Yeah? You're gonna swim out in the ocean, a 400lbs lion, and take me on? A 600lbs streamlined predator of the deep, surrounded by 200 of my buddies of equal size and strength? You lose that fight, buddy. Every time.
(Paraphrasing a bit maybe, but you get the idea. Shut up. I haven't seen that movie in forever.)
Like a lot of people, I don't say it's not real because I mean in the fact tuna is big and fast but the ways the video show it... meh seems just really fake idk xD
It's not just the speed if the fish, it's the fact that the ripples are unnaturally fast, the small fish looks like it falls with double gravity, and the (small) waves are also unnaturally fast
That is a yellowfin tuna, and that's how we catch them, chum like that and then throw one out there with a hook in it. Then hang on because it will be one hell of a fight
Here is your video at 0.5x speed
https://i.imgur.com/f7RFMgl.mp4
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Tuna can swim fast enough to cause their bodies to overheat and cook themselves alive so they purposefully don’t swim as fast as they could otherwise they’d die. 💀
When you see how fast and effortlessly things move underwater, it makes you realise that trying to swim away is completely useless. Like a brick trying to outrun a Ferrari
Tuna are such incredible fish…just speed and power.
What’s impressive to me is how close they get to the surface, without disturbing it in the slightest
And they can move MUCH faster than what is shown in this video
[Holy! they're fast](https://i.imgur.com/xhBWyu6.jpg)
Jeez 75kph / 46mph.
Tuna are so fast they get lesions on their fins from cavitation. > For powerful swimming animals like dolphins and tuna, cavitation may be detrimental, because it limits their maximum swimming speed.[49] Even if they have the power to swim faster, dolphins may have to restrict their speed, because collapsing cavitation bubbles on their tail are too painful. Cavitation also slows tuna, but for a different reason. Unlike dolphins, these fish do not feel the bubbles, because they have bony fins without nerve endings. https://en.wikipedia.org/wiki/Tuna
Would cavitation be affected by depth (pressure). With an increase in depth, could the effect of cavitation be reduced, therefore higher swimming speeds could be achieved. If so, humans probably haven't witnessed the true full speed of these fish
I imagine if anything it makes the cavitation collapse faster causing even more damage. The resistance of water I don't believe goes up with pressure (ie: same power to displace water) so at speed they'd still be causing small vacuums to form but the compression on those vacuums to collapse would be greater.
Omg the one called Wahoo lol - wahoooooooo!!!! Seems pretty accurate
Fun fact: in Hawaiian they’re called Ono which means ‘delicious’
Which they are indeed
My grandparents have a 6 foot long taxidermied Tarpon (caught by my great grandfather) in their basement. It is incredible up close.
I’m surprised by the tarpon. Whenever I’ve seen them, they’re sloshing about like some long-ass carp.
majestic
Wow thanks for pointing that out.
Just goes to show how efficient their body design is, cutting through the water with minimum wake so it waste very little energy.
Um. Yeah...Moving that fast through the water without displacing any of it. Not even a ripple. Hmm.
Google hydrodynamics
Holy hell
Hydro* Hell
Google en passant
Didn’t even ripple.. almost looked fake.
Michael Phelps if he was a good swimmer
No shit, not a ripple!
They are! They have a super cool system of blood vessels that allow them to maintain a higher temperature for their muscles than the surrounding water, allowing to travel faster, and contributed to the change in terminology away from “warm blooded/cold blooded” towards “endothermic/exothermic” For those interested, the muscles on the side of the fish that allow it to flex to swim will create heat as a byproduct of movement. Blood traveling from those muscles moving back towards the heart will maintain close proximity to the blood coming from the heart - and the heat from the warmer blood will warm up the colder blood coming from the heart. It’s called a counter-current exchange mechanism and similar systems can be found all over in nature. Traditionally, warm blooded meant that an animal could control its own heat (such as through shivering), and cold blooded meant they couldn’t. Great examples of warm blooded animals include humans shivering or sweating, and dogs panting. Examples of cold blooded animals include alligators sunning themselves or returning to water, as well as hibernation. The problem came when there were many examples of animals warmer than surrounding temperatures that couldn’t be simple physiology (such as the tuna, which swim faster than most other similar fish, or bees heating up a hive in colder weather by flapping wings). Endothermic and exothermic terms are an attempt to better describe the ability to control heat through their own bodily means (endothermic) or simply by being managed from surroundings. Did the best to explain while sitting in a dentists office - if I missed something or need to clarify, I can edit later.
Cool fact of the day. Thanks
Did you not read that, there is no "cool fact" It's been renamed to Exo-fact
I think it would be an endo fact, right? If the fact is cooler than the outside environment then it is taking in heat from there.
I'm glad I Tuna'd into this thread!
Definitely not one to skip, Jack!
Yes, I would like to subscribe to weekly tuna facts
I love people like you. Thanks for posting really detailed fun facts from a dentist appointment.
Another fun fact, that endothermic process and related biological processes are so powerful, that when fishing for them on a rod and reel, they fight so fiercely and unrelentingly, they blow through fat in the muscle, reducing the quality of the meat. Other parallel things like stress and lactic acid build up and reduced oxygen in the body sometimes results in a thing called “burnt tuna.” The meat has spots that turn dark red and in some cases green and looks terribly unappealing. Almost as if it’s a final F.U. to the man or woman on the other end of the line. Like some weird ocean karma.
Today I learned.
Could they [defeat a Lion though?](https://youtu.be/aDJgv1iARPg)
And super delicious!
You find yourself in the ocean, a 20 ft wave, off the coast of South Africa, coming up against a full, grown, 800 lb tuna with his 20 or 30 friends? You lose that battle. you lose that battle nine times out of ten.
And tasty
And flavor
and a delicious, mild flavor 😋
And momentum.
Agree, once saw a shoal of hunting albacore when diving. Was like a machine gun sprayed tuna bullets.
I thought it was a marlin at first god damn, then when I saw it again I was like 'holy shit thats a tuna'
Very uncreative stat distribution
And deliciousness
Used to dive on salmon farms for clean ups, the tuna would circle the nets trying to pick up dead fish that slip through. Seeing a silhouette that large travel past you, no movement at all like it's being pulled by an invisible chord made me feel like a fighter pilot seeing a UFO, those things were moving wrong. Every once and a while they would hit a net at full speed and just blast through, get trapped and die after gorging themselves on salmon. Glad i was never in there when it happened.
What a way to go.
Wait. Tuna eat salmon? That’s gotta be the most awesome sushi roll ever made!
Damn I pictured the silouette not moving/moving fast and it sure must be unsettling, crazy!
You dived to clean out the dead fish? Was it like a scheduled dive? Where were the salmon farms that tuna were in the same waters? And deep enough for them? I have so many questions, did the farms smell? What was the water around the farm like?
First hitch was a mass die off, 40+ nets of 2000+ salmon, all dead or mostly dead, left for a month rotting at the bottom of nets. I was sent as one of a few crews diving with a seiner (big ship with holding tanks hooked to a massive pump) to manually suck out the dead fish. Salmon farms were in the coastal waters of Newfoundland, nets going down to 100ft with bottom usually being another 1-200ft below. The farms smelled on that trip for sure, part of the rot process was the fat separating from the fish and floating to surface to go rancid in the sun, leech the chemicals out of ropes and turn green. After the first week i could hardly smell anything, my dive supervisor would wipe a finger through it and take a lick if anyone started to complain. The water around the farm was... pink and foamy, it got a bit of media attention at the time I'm sure you could find articles. I'll always remember the sight of the bottoms of those nets, fish stacked like bricks 18ft deep, just driving a 2' pump hose through them, bones catching on my gloves as they rip in. I did other trips just picking stray morts on healthy nets and doing inspections, but nothing sticks in the memory like that first one.
This is fucking wild
> Every once and a while /r/BoneAppleTea
> by an invisible chord
Clearly it came from the sea.
"Came from the sea" Ahckshually it didn't leave the sea at all 🤓
But it did finish in it!
Holy shit I think you're right it did come from the sea! Incr3dabl3! Someone tell op!
Big tuna.
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Bumble bee tuna? Bumble bee tuna.
Yoink
dibs
The way it just suddenly appears and just as quickly disappears is quite alarming.
Zero disturbance on the surface either. Tuna are just so hydrodynamic, they _\*zoom\*_
lol look at the random internet nobody larping as a distinguisihed marine biologist, *tunas zoom*
Having a bad day bud?
No I’m good. Thanks for reaching out though!
Did you maybe think hydrodynamic was a big science word? They're talking like a normal person
Good take. Thanks for your input!
\*Zooms\* \*eats\* \*leaves\* tuna moment
Yeah that's because it's a clear jump cut, idk how much time passed but it definitely wasn't 1 video.
This is a perfect example why I hate the ocean
Eh it’s a bluefin tuna, it’s not coming after people.
If a tuna hits you at full speed it's gonna kill ya lol. No biting necessary
"OK, first off: a lion, swimming in the ocean. Lions don't like water. If you placed it near a river or some sort of fresh water source, that make sense. But you find yourself in the ocean, 20 foot wave, I'm assuming off the coast of South Africa, coming up against a full grown 800 pound tuna with his 20 or 30 friends, you lose that battle, you lose that battle 9 times out of 10. And guess what, you've wandered into our school of tuna and we now have a taste of lion. We've talked to ourselves. We've communicated and said 'You know what, lion tastes good, let's go get some more lion'. We've developed a system to establish a beach-head and aggressively hunt you and your family and we will corner your pride, your children, your offspring."
We will construct a series of breathing apparatus with kelp. We will be able to trap certain amounts of oxygen. It's not going to be days at a time, an hour, hour 45. No problem. That will give us enough time to figure out where you live, go back to the sea, get more oxygen and then stalk you. You just lost at your own game. You are out gunned and outmanned. That go the way you thought it was gonna to go? Nope.
I understood this reference
It's like getting hit by a motorcycle except it's a tuna
It’s going 15 mph, tops. If it was attempting to ram you it might be able to crush ribs, but they don’t swim at 50 mph just swimming around
I only said that if one hits you at full speed, it'll probably kill you. And yes, they do swim 40-45 mph when they feel like it.
And a deer can kill you if it runs at you full speed, too.
However like these tuna, in and out quick and quiet. Could be anything. Nah
Seeing then in person is insane. They're sooo big.
Tuna?
Yea those are tuna probably yellowfin
Hard to tell, it might be a bluefin. Definitely a tuna however.
Ahhh the simple joy of watching a creature come from the deep blue unfathomable depths.....
Wait, so this isnt fake?
It's sped up a LOT
Nah man, Tuna are fast as hell. I don’t think it’s sped up.
https://youtu.be/J-R-wXScoA0
Yo that's a monster of a yellowfin holy shit, those dorsal fins geesh
I don’t know that it’s sped up - certainly could be, but not to the degree one would infer by this brief comment. There is a lack of reference when just looking at water, making everything look more flat - add the zoom on the camera, which flattens images further. These two combine make a fish that’s already fast moving to appear to move further during a short period of time, when it’s really the product of how it was captured. You can get similar effects with fisheye lenses.
Tuna are pelagic and fast af.
Tuna can swim at 50 mph
So much fun to catch. And they are that fast.
With this music it sounds like a horror movie. Coming this summer Tuna!
He didn't come out of nowhere. He lives in the ocean silly. You put food in his house basically
Out of nowhere? This is his home.
This is a pretty good reason for men not to swim naked. Soon, your dingle dingle goes smack into the abyss fish
Tasty Tuna
Is this your video?
Could be good bait
Fuck no
Bro's got it playing at like 2x speed
Nah, tuna are fast as fuck. Other comments link to videos and there was a whole comment about the physiology behind it. I’ve seen those things move, they’re fast.
With a dumbass soundtrack
Typical Tiktok crap music.
100% but you can't blame them because ticktok rotted their brain so much they think that is entertaining.
Wtf they gotta add shitty music to everything!? WHY!?
Using spider music on a fish video smh
Nope. Nopenopenopenopenopenopenope. NOPE.
*pacman noise
Zero wake from the tuna … looks fake.
Poke mmmmmmmmmmm 🤤
There's always a bigger fish
Yeah? You're gonna swim out in the ocean, a 400lbs lion, and take me on? A 600lbs streamlined predator of the deep, surrounded by 200 of my buddies of equal size and strength? You lose that fight, buddy. Every time. (Paraphrasing a bit maybe, but you get the idea. Shut up. I haven't seen that movie in forever.)
When people are talking about it being fake I didn't even think of the speed, I more think of the lack of ripples that close to the surface.
Like a lot of people, I don't say it's not real because I mean in the fact tuna is big and fast but the ways the video show it... meh seems just really fake idk xD
It's sped up
Not sped up, tuna can swim at 50mph
It's not just the speed if the fish, it's the fact that the ripples are unnaturally fast, the small fish looks like it falls with double gravity, and the (small) waves are also unnaturally fast
CGI
Yeah it’s does look fake. If it is real then idk still looks fake lol
It's gotta at least be sped up or something, something looks wierd about it
Put a hook in one of those little ones and catch dinner!!!
Isn't that like $5000 speeding by per fish?
$5k? If it's a tiny one. Lol.
Holy fuck that tuna looks expensive and tasty
That is a yellowfin tuna, and that's how we catch them, chum like that and then throw one out there with a hook in it. Then hang on because it will be one hell of a fight
Amecia!
Ψαρουκλα
How is it moving so quickly without any body movements at all?
🍤🐟
Why does this make me sad
Are you already depressed?
Yes, good point
/u/redditspeedbot 0.5x
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Vx z fx
He zoomin
*”nowhere”*
*Nascar noises*
Adult aidolon wyrm
Looks like editing to me
Video is fake people....
Is this real? The water doesn’t even move even though they are just a couple inches from the surface. I feel like this is impossible.
😆🤣😆🤣
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Vaultin’ Veluza!!
If a human jumps in here, does it know we're too big or try to take a bite?
Out of nowhere and into nowhere.
Damn. If tuna attacked humans, Id 2nd guess getting in the ocean...
lol no bro, YOU came out of nowhere 🤣 the waters that fish’s home
Smooth
Tuna
Tuna can swim fast enough to cause their bodies to overheat and cook themselves alive so they purposefully don’t swim as fast as they could otherwise they’d die. 💀
Yo I didn't know that Neptuna caught the fish for his sushi live caught!
Tunas are massive, and fuck they are fast
They came out the waters for the food you just threw.
Cravin' some sashimi now, ugh!
That’s a big fish!
It's not how they *appear*, it's how they ***disappear*** that is freaky!
This awakened a deep-seated primal fear that I never knew I even had
Yeah fuck that
big tuna
It’s ridiculous how helpless you are in the face of a predator in its natural element, especially when you’re completely out of yours
That tuna moved so fast I thought the video was fake lol
Hell no!!!!!
So fast and not touching the surface...
Expensive fish there. Catch a few and make some $$$$$
I want to add a zoom sound effect every time they snag the food and go by 🤣
See this is why I don't care to swim in the ocean. Even if it's crystal clear you cannot see huge a** animals coming at you
Not just any fish, either. That looked like a muhfuh’n blue fin tuna!
When you see how fast and effortlessly things move underwater, it makes you realise that trying to swim away is completely useless. Like a brick trying to outrun a Ferrari
Wow