Some kinda slug? Need help id this

[Jennlee]

It moves very slow. Had a recent ammonia spike and a lot of different things come out of the live rock

 

[DiverDave]

I know some slugs like blue neon are bad to have because all they eat is flatworm and you really don't want those...... do some research..... maybe LiveAquaria.com / slugs may help.

 

[mr_X]

There are literally thousands of different kind of slugs. It's very difficult to know whether it's beneficial or not.
I would keep an eye on it and see what it does.
Here is a partial species list you can browse....
http://www.seaslugforum.net/species.htm

 

[Jennlee]

Do you guys think maybe it could be a sea cucumber?

 

[mr_X]

I was under the impression cucumbers are in the slug family.

 

[Fresh2o]

I think sea cucumbers are more related to starfish and sand dollars while sea slugs are in the mollusk (family, class, group, etc)

 

[mr_X]

"Sea slug is a common name used for several different groups of saltwater snails that either lack a shell or have only an internal shell. It is a paraphyletic name used for various lineages of marine gastropod molluscs that are either not conchiferous (shell-bearing) or appear not to be.
The phrase "sea slug" is often applied to nudibranchs (many members of which are colorful and are a noticeable part of the underwater fauna), sea hares, the sacoglossans, various families of bubble snails (Cephalaspidea), the sorbeoconch family Pterotracheoidea, the pulmonate (air-breathing) sea slug family Onchidiidae, and others.
Sea cucumbers are also sometimes included as sea slugs.[1][2]"

Taken from-

http://en.wikipedia.org/wiki/Sea_slug#cite_note-2
http://en.wikipedia.org/wiki/Sea_slug

 

[Fresh2o]

With over 1250 known species of sea cucumber, it could be one. I've even seen it in a menu at a Chinese restaurant. Eh.

I'd keep an eye on it since its identity is questionable.