Tiny Worm/Slug thing?

[mjszos]

Really hard to snag a photo of this, it’s a tiny (1cm or so) little worm/slug thing with antennae. Popped up today, never seen it before

it’s belly is white, it’s back is brownish with darker speckles on it.

thanks in advance!

 

[JGT]

Appears to be some type of nudibranch. Can’t say if it’s good or bad without better pics.

 

[mjszos]

This is about the best I can do. Pulled it from the tank and dropped it in a specimen cup. It’s so small my camera doesn’t even want to focus on it.

 

[mjszos]

More pics.

 

[SlugSnorter]

More pics.

"sea bunny" nudibranch maybe.

Their diet is very mysterious. They are believed to eat mainly sponges, but may also occasionally eat algae and some believe they may very rarely eat small gastropods.

 

[TalkinTangie]

I literally just posted about one of these not seeing this thread... the first picture is identical to what I am seeing. I have Berghia nudibranches in my tank but this did not look like a Berghia.

I will have to research the "sea bunny" and see if that matches up.

OP did you ever make a determination on what it was?

Here is a picture of mine!

 

[ISpeakForTheSeas]

The one the OP has in their tank looks to be a Dermatobranchus sp. (see the quote below for info).

Actually, I can't see any of the feathery gills you'd typically find on a Jorunna nudibranch on this guy (though they do share some resemblance). It looks more to me like a Dermatobranchus spp. which are known for eating octocorals (softies, gorgonians, etc.).

ID'ing them down to the species is a bit of tedious process for me (and sometimes I can't get a confirmed species), but here are two recent links from people with similar (if not the same species) nudibranchs (tentatively ID'ed as Dermatobranchus fortunatus, though I'm not sure the rhinophores are right for it) that were alleged to be GSP eaters.

help with ID nudibranch?

Hi, found this in some GSP; any idea what it is?

www.reef2reef.com

Whats this ? Sea slug/ cucumber ?

Just found 3 of these sea slug/ cucumber/nudi looking things. Hasn't got the frilly Gill things that nudis have on their back so probably rules that out. It's on a gsp that just bought and camouflage quite good same colour as top of gsp frag like browny/ white,2 are very small like 8-12 mm long...

www.reef2reef.com

Personally, I'd say sump it with some GSP and sponges and see if you can confirm the genus/get it eating, but that's just me.