Friend or Foe

[beatusb]

Noob needing help to determine what this is. Keep or terminate???

 

[NashobaTek]

Bump, interesting.

 

[Spieg]

Can you get a pic with better light?

 

[CoralB]

What size is it ?

 

[Mr_Knightley]

Looks like some sort of nudibranch, don't quote me on this but I believe that type of nudibranch feeds on flatworms. @KJ you have any idea? You're good at IDs.

 

[KJ]

Elysia sp.

 

[Mr_Knightley]

After further research it is definitely a slug from the order Cephalaspidea, which includes bubble snails and blue velvet nudibranchs so I have no clear clue of what it might eat. Slugs often come in on the organism that they eat, and will often be colored similarly to what they eat. I would sump it until you can get a totally positive ID, but it most likely eats flatworms.

 

[beatusb]

if it came in on what it eats, and it eats flat worms, that means I may have them too. Thanks for the ID.

It's coloration is alternating splotches of light grey and a greenish gray. It's about the size of a pencil point when stretched out. If that helps.

I captured and removed it just in case.

 

[beatusb]

It appears I have a juvenile lettuce sea slug. (Elysia crispata)