id nudibranch and crab?

[pez]

I recently found these animals in my tank. The crab I am not worried about, as I have at least 4 and they *seem* harmless. The nudibranch, however, is a bit of a concern. I have not seen it eating anything, bit given it's size, it does concern me. Any thoughts?

http://www.cybereefguru.com/120/unident.html

The crab is still in the tank, but I captured the nubibranch last night and have it in a holding tub until I get some insight. Any help would be great.

-Tom

[ February 03, 2002: Message edited by: pez ]</p>

 

[carver]

That crab is the ugly little guy that I questioned in an earlier post. I am glad to hear that he doesn't seem to be a problem. I am still wondering if anyone knows if they get larger and cause problems. If nothing else, they sure are ugly!!!

 

[misso]

I have atleast 6 crabs (the same as yours)in my tank. They have lived in the tank for over a year and they haven`t touched fishes or corals.
They just seems to eat algae and "****".
The largest one is 1"

I think they are good guys

 

[Wormy]

My guess would be that your nudibrach is actually a flatworm. You should be able to see exposed "lungs" on a nudibrach (hence the name, meaning 'naked lung').

Other than that, I can't help ya. Sorry.