What animal is this??

[Seb8316]

This thing has been in on my hermit crab’s shell and in my gsp. I did my best trying to find it on the web. Can anyone tell me what this is and if its harmful?

 

Second pic i didnt mean to put sorry

[Parapodia]

Most likely a Vermetid snail.

 

https://en.wikipedia.org/wiki/Vermetidae

 

https://reefbuilders.com/2023/05/11/how-to-get-rid-of-vermetid-snails/

 

 

[Seb8316]

This one moves like a slug. Are you sure?

[Parapodia]

If it is the same animal moving between the gsp and the hermit crab shell, then no, not a vermetid.

Stomatella is another type of snail often found in reef tanks. It differs from the usual snail anatomy in that it only has a sort of half shell on the top of its body and could  easily be mistaken for a slug.

 

https://www.aquaticcommunity.com/SwSnails/Stomatella.php

[mcarroll]

I dunno if those "antennae" look like what you find on Stomatella:

vs

 

IMO it looks like a nudibranch/sea slug of some kind.....a better photo would help tho!

[Seb8316]

Alright here is another picture

[ml86743]

gotta be some kind of nudibranch 

[mcarroll]

Kinda looks like these, but I bet there are a lot of lookalikes....

 

https://en.wikipedia.org/wiki/Jorunna_parva

[mcarroll]

It would be really cool if it was this guy...

https://aquariumbreeder.com/costasiella-kuroshimae-care/

 

...although the look of yours would imply that yours might be starving since it has no algae to eat.  (I didn't read that whole article yet, so check it out.) 

[Seb8316]

I found him

again. He looks bigger.

 

Edited June 19, 2024 by Seb8316
typo

[sapling]

On 6/18/2024 at 12:01 PM, ml86743 said:

gotta be some kind of nudibranch 

the one with the black tips I agree, doesnt look like a stoma to me, I had tons, 

 

the one in that new video looks too big to be the same nudi, and doesnt have the black tips. maybe another species of nudi, or maybe adult? im not sure,

have you noticed any coral issues? 

[Staticmoves]

On 6/18/2024 at 8:14 PM, Seb8316 said:

I found him

again. He looks bigger.

 

 

As long as he behaves, looks like a cool addition.

[Snow_Phoenix]

Am I the only one who thinks the tiny hitchiker nudi is adorable? I mean, he has tiny cute black 'ears'! 

(I'd keep him, but I might be biased here) 

[Seb8316]

4 hours ago, Staticmoves said:

As long as he behaves, looks like a cool addition.

 

5 hours ago, sapling said:

the one with the black tips I agree, doesnt look like a stoma to me, I had tons, 

 

the one in that new video looks too big to be the same nudi, and doesnt have the black tips. maybe another species of nudi, or maybe adult? im not sure,

have you noticed any coral issues? 

One of them has been going in and out of my struggling gsp. This picture was taken a while back

 

 

 

 

[Seb8316]

This is what he looks like rn.

[andre]

Looks like a nudibranch to me. The antennae are the giveaway. I would remove it from the tank.