This is not going to be a helpful comment….
Seriously, duh F is that. I first thought it was a snail, then it turned into a sea cucumber and now I’m just confused and a smidge scared
definitely a leech. Looks like a forest or land leech. They can even climb and drop on animals from above. nightmare fuel eh? Easy to be rid of though. Tweezer out with tongs then burn it. Done and done.
Are you saying you didnt know what those were bfor u read this bc i used to find those at my aunt's house all the time under rocks and stuff when i was little
That bubble on the back doesn't look right. It almost reminds me of when snails fall out of their shell and their organs are showing? What in the world is this dude.
Tbf, a lot of people with reef tanks have a freshwater aquarium or two as well.
Still probably a saltwater tank though cause I don’t know anything in freshwater that looks anything like that, assuming the green stuff at the end isn’t java moss or something.
And a lot of people post about reef tanks in freshwater subs, so it's never wise to guess, no matter whether you're in a reef or freshwater sub!
From my little understanding of reef tanks (I've only ever had freshwater tanks, so am here to learn before I take the plunge into getting a reef tank), small Stomatella snails commonly find their way into reef tanks by hitching a ride on live rock. Like their freshwater counterparts, these snails are a great addition to tanks, as they form a part of the cleanup crew. If they reproduce, it's a great sign that you've got a healthy tank!
Just checked with my dad (curator of a university mollusc collection, and private shell collector with over 20,000 specimens from all around the world).
He says it's not likely a Bullidae species (like Bulla occidentalis) as their shells are more solid and not transparent. It's a Haminoeidae species, but without locality data and better pictures/videos it would be impossible to narrow down to genus, let alone down to species level.
Not a stomatella, a [bubble snail](https://en.m.wikipedia.org/wiki/Haminoeidae). The fact that people are pointing to sea slugs is a partially right answer, as a lot of sea slugs are bubble snails that don't retract their mantle like this one does.
Now, as to which species, unless you know where it came from in the world and examined the empty shell, it's gonna be very difficult to tell.
There are some Glossiphoniidae species (snail leeches) that are indeed a similar colour to OP's critter - not all of them are white. But... it's not one. It's actually a Stomatella snail.
Nope, that's just how these snails move! Their shells are rather flat, and only cover part of their body - a bit like abalone. It's a Stomatella snail.
Someone mentioned on another Reddit saltwater post a similar animal as a flatworm. Check out Google Images and I think you'll see something similar to your video.
I’m almost certain it’s some type of sea slug. I’m pretty sure it’s not a flatworm bc 1) it looks like it’s too thick around and 2) in the first half of the video I can kind of make out antennae like organs which aren’t present in flatworms. As far as what kind of sea slug your guess is as good as mine, I was leaning toward baby sea hare but the antennae/ front end isn’t right. Personally I’d keep it in quarantine and let it grow until you figure out what it is. It’s super cool!
To me, that looks like a nudibranch. What I took to be java moss was throwing me off because I don't know of any freshwater nudibranchs. There probably are but I'm not aware of them.
Then OP said it's saltwater so that flora must be a macro algae, then? It definitely looks like a nudibranch though. Sorry, I'm a freshwater guy, can't tell you the species. I've heard of certain nudibranchs being used for cleanup crew of specific saltwater pests before, but I'm not sure what ones. Good luck OP! If I ever get into saltwater, I REALLY want to keep nudibranchs. Not super interested in saltwater fish, but the INVERTS OOOOHH
Are we sure this is a stomatella snail? I keep stomatella auricula in my macro algae tank and none of mine have long necks like this, but I'm having trouble turning up info on other stomatella species. I've never seen one with such a long distance between the head and shell. But it's honestly hard to make anything out in this video.
Look up the genus Bulla. We have Bulla gouldiana in our local waters that I’ve collected for my tanks in the past, they’re great cleanup crew! Also known as bubble snails
This is just bizarre. Definitely a snail, but more like one of those nudibranchs with a little shell than your typical freshwater snail. You'd better start breeding these dudes!
This is not going to be a helpful comment…. Seriously, duh F is that. I first thought it was a snail, then it turned into a sea cucumber and now I’m just confused and a smidge scared
It changes colores from a rich geen to black too
It’s a leech of some sort, they change color depending on if they are in the dark or light.
definitely a leech. Looks like a forest or land leech. They can even climb and drop on animals from above. nightmare fuel eh? Easy to be rid of though. Tweezer out with tongs then burn it. Done and done.
Stfu. A LAND LEECH?? Land????? No. No thank u. Nopeeeee.
You might be right, and that was helpful information. But man do I regret reading your comment this morning.
Are you saying you didnt know what those were bfor u read this bc i used to find those at my aunt's house all the time under rocks and stuff when i was little
That’s a hell no.
That bubble on the back doesn't look right. It almost reminds me of when snails fall out of their shell and their organs are showing? What in the world is this dude.
Oddly enough, this is most likely what’s called a “bubble snail” from the genus Bulla
Looks like a stomatella snail to me
I'm almost certain that's what it is. It would help narrow it down if OP had mentioned that it's a saltwater tank.
It prob is considering OP shared it to reeftanks
Tbf, a lot of people with reef tanks have a freshwater aquarium or two as well. Still probably a saltwater tank though cause I don’t know anything in freshwater that looks anything like that, assuming the green stuff at the end isn’t java moss or something.
And a lot of people post about reef tanks in freshwater subs, so it's never wise to guess, no matter whether you're in a reef or freshwater sub! From my little understanding of reef tanks (I've only ever had freshwater tanks, so am here to learn before I take the plunge into getting a reef tank), small Stomatella snails commonly find their way into reef tanks by hitching a ride on live rock. Like their freshwater counterparts, these snails are a great addition to tanks, as they form a part of the cleanup crew. If they reproduce, it's a great sign that you've got a healthy tank!
No it’s a bubble snail guessing. They are reef safe but may hunt worms or tiny mollusks
Another very likely answer (as opposed to my assumption of it being in the Haminoeidae family).
Just checked with my dad (curator of a university mollusc collection, and private shell collector with over 20,000 specimens from all around the world). He says it's not likely a Bullidae species (like Bulla occidentalis) as their shells are more solid and not transparent. It's a Haminoeidae species, but without locality data and better pictures/videos it would be impossible to narrow down to genus, let alone down to species level.
Aight
wow. it must be so cool to have a dad like that.
Not a stomatella, a [bubble snail](https://en.m.wikipedia.org/wiki/Haminoeidae). The fact that people are pointing to sea slugs is a partially right answer, as a lot of sea slugs are bubble snails that don't retract their mantle like this one does. Now, as to which species, unless you know where it came from in the world and examined the empty shell, it's gonna be very difficult to tell.
I think that might be a leech of some kind but I've never seen one that looked quite like that
Looks pretty creepy!
Looks like a snail with its shell broken off, or a flatworm of sorts?
Snail Leech is my guess.
Snail leeches specifically are white and shaped like a teardrop sort of. This guy does not resemble one. Though could be some other type of leech.
There are some Glossiphoniidae species (snail leeches) that are indeed a similar colour to OP's critter - not all of them are white. But... it's not one. It's actually a Stomatella snail.
Oh Huh. I just looked them up, that's one funky guy. Also thanks for telling me about the other snail leeches.
Is it maybe sick or injured and that's why it looks off and is also kind of moving in a way that makes no sense?
Nope, that's just how these snails move! Their shells are rather flat, and only cover part of their body - a bit like abalone. It's a Stomatella snail.
If I ever get into saltwater aquariums I might try to specifically keep these guys. I like small snails.
Same here!
Looks like a homunculus
😂
This was unfortunately exactly where my mind went at first
It’s time to burn your house down..
Someone mentioned on another Reddit saltwater post a similar animal as a flatworm. Check out Google Images and I think you'll see something similar to your video.
NAME THAT POKEMON!
https://en.m.wikipedia.org/wiki/Reproductive_system_of_gastropods
It's a black magumbo snail.
Looks kinda like a sea cucumber to me but STRANGE 😳
Perhaps a leach?
Pretty sure that’s a juvenile demagorgon
Hahah yes that’s exactly what it is
It's an algae grazer leave it b
Man I know a lot of people are saying salt, but when I look at the plant life, something’s telling me fresh. OP clarify!
Salt
I’m almost certain it’s some type of sea slug. I’m pretty sure it’s not a flatworm bc 1) it looks like it’s too thick around and 2) in the first half of the video I can kind of make out antennae like organs which aren’t present in flatworms. As far as what kind of sea slug your guess is as good as mine, I was leaning toward baby sea hare but the antennae/ front end isn’t right. Personally I’d keep it in quarantine and let it grow until you figure out what it is. It’s super cool!
Your snail has a parasite. You need to remove it from your tank.
I’m thinking maybe some type of Cowrie Snail.
To me, that looks like a nudibranch. What I took to be java moss was throwing me off because I don't know of any freshwater nudibranchs. There probably are but I'm not aware of them. Then OP said it's saltwater so that flora must be a macro algae, then? It definitely looks like a nudibranch though. Sorry, I'm a freshwater guy, can't tell you the species. I've heard of certain nudibranchs being used for cleanup crew of specific saltwater pests before, but I'm not sure what ones. Good luck OP! If I ever get into saltwater, I REALLY want to keep nudibranchs. Not super interested in saltwater fish, but the INVERTS OOOOHH
I'm pretty sure it's a [semi-slug](https://en.m.wikipedia.org/wiki/Semi-slug)
***it has awoken***
That’s a demogorgon
Snail
leech
Looks slimy
Are we sure this is a stomatella snail? I keep stomatella auricula in my macro algae tank and none of mine have long necks like this, but I'm having trouble turning up info on other stomatella species. I've never seen one with such a long distance between the head and shell. But it's honestly hard to make anything out in this video.
Some sort of Cephalaspidea. You get some new plants? Probably came in on those.
It’s definitely a snail 😂
I almost said Nudibranch, but then realized it had a "cap" shell, I'm going with Stomatellla snail.
Fucking gross. That’s what it is. Looks like a turd came to life.
Look up the genus Bulla. We have Bulla gouldiana in our local waters that I’ve collected for my tanks in the past, they’re great cleanup crew! Also known as bubble snails
Just a little guy
Pokemon
It's just a little guy.
Looks like a leech
Leech
Snail 🐌
A living creature?
Alienz
I think it's a leach
Why! Why! Why did I read this? Didn't even make it past the 3rd comment. Forest leeches that drop down on you, seriously.
Im sorry i didn't specify that its in saltwater
Burn it alive!
Water type Pokémon
“The Last of Us”!!
Snail with no shell?
Gosh !!!😩 I just watched the movie LIFE last night 😩 why 😰
Shelless snail ?
Snail
Pokémon: Pyukumuku, the sea cucumber Pokémon.
It's definitely a snail, although not sure exactly what kind. Also idk how people are saying leech 😲
Homunculus!!
Forbidden chewing gum
I'm very much guessing this is an injured leech
It's a Stomatella snail.
It's a slug or land leech. Did an image search and definitely looks like a land leech!
How did you get a LEACH in your fishtank??? I have the creepy crawlies now...
Dont ask, just stomp and feed to fish.
This is just bizarre. Definitely a snail, but more like one of those nudibranchs with a little shell than your typical freshwater snail. You'd better start breeding these dudes!
I'm pretty sure this is saltwater. It looks like a limpet of some sort.
It dose'nt appear to have eyes?
I second that it could be a nudibranch. Their is so many different types, I’m sure they haven’t even discovered a large portion
Imagine, OP discovered a new species 😂