slug thing??

[bettaboi]

ok im writing this for my dad beause he really loves his fish tank but im afraid if we let it go it could be bad) ok now there is a thing in our tank that looks like a slug but it only comes out at night it came from a batch of colypso my dad got from one of his reef buddies. hes afraid it might be a flatworm but from the pics ive seen this looks very short (1/2in long) and not all that flat any help would be appreciated by me and my dad.

p.s. its a 75gallon with 6 fish and lots of snails and crabs

 

[parker313]

I've got one too. It's pretty gross looking but I haven't caught it munching on any corals or anything...

 

[bettaboi]

*bump bump* ne one know wut it might be

 

[Ed4567]

Sounds like a nudibranch to me- try searching for pictures to compare.

 

[Navarre]

Does this thing move very fast for a creature like this? does it have aparticular colour and does it have a flat shell very much like a fingernail?

 

[parker313]

Mine moves at a slug like pace - not very slow, but not particularly fast.

It's almost exactly the same sandy brown color as the live rock.

It has that fingernail looking shell on its back.

I just assumed it was a sea slug of some sort or another and left it in there.

 

[bettaboi]

parker i think we got the exact same thing now we just gotta see if its bad

 

[Navarre]

OK the fingernail shell was the keyword i hoped you would answer and this was done!
If this does have a fingenail type shell then its almost definately a Stomatella Snail. Completely harmless and a very good workhorse among the cleanup crew. They can move like rockets when they want too and also breed easily in captivity. They are purely algae/detrius eaters and are nothing to worry over. Shows that the liverock you have is good quality and there is alot of life still in there waiting to get out!

 

[parker313]

Cool!! Thanks Navarre! ...and thanks, bettaboi for asking

 

[parker313]

I just did a google image search and am pretty sure that the stomatella snail is what I have