What is this??

[skinnywater66]

Just caught this guy cruising on my rock.

 

[ISpeakForTheSeas]

Some kind of nudibranch - not sure which. Some are fine, some are coral eaters.

 

[SlugSnorter]

Just caught this guy cruising on my rock.

opalescent nudibranch maybe.

eats some kinds of small nems and hydroids. Will likely die in your tank due to starvation.

 

[sixty_reefer]

Looks like a Aipatasia eating nudibranch

 

[SlugSnorter]

Looks like a Aipatasia eating nudibranch

close, but not quite. Matches an Opalescent better IMO.

 

[sixty_reefer]

close, but not quite. Matches an Opalescent better IMO.

It could be, mine used to look like this wend they were well fed, a little blue tint to it

 

[AquaGemCorals]

Berghia stephanieae is a species of sea slug, an aeolid nudibranch. Look at this site https://www.saltyunderground.com/8-berghia-nudibranch

 

[JoJosReef]

Where is your rock from?

I got two very similar from my TBS rocks. Sometimes more orangeish streaks, but sometimes looked darker. I gave both of them to a local reefer trying to breed Berghia and he confirmed that they ate aiptasia.

 

[SlugSnorter]

Berghia stephanieae is a species of sea slug, an aeolid nudibranch. Look at this site https://www.saltyunderground.com/8-berghia-nudibranch

Id say the coloration and shape are a bit off. Then again, nudis are horribly understudied with a few species likely being clumped together. Either way, I don't think it'll last super long in OPs tank.

 

[skinnywater66]

So hard to ID. Just looked online and there are so many of these.

 

[skinnywater66]

Where is your rock from?

I got two very similar from my TBS rocks. Sometimes more orangeish streaks, but sometimes looked darker. I gave both of them to a local reefer trying to breed Berghia and he confirmed that they ate aiptasia.

Got the rock from TBS. Yes when I caught it there was a little orange streaks.

 

[sixty_reefer]

Some of my berguias they go through 3 colours

blue well feed
Brown ok food wise
White need food

 

[JoJosReef]

Got the rock from TBS. Yes when I caught it there was a little orange streaks.

Here is one of the two I got off of my TBS rocks. Definitely an Aiptasia eater and apparently breeding--will have to follow-up on how they are doing.