[freefallingegg]

I have two crabs that came on live rock...and a slug that I can't find what it is. Someone attacked and killed my emerald crab...I'm guessing it wasn't the slug...and it was one of the crabs. The crabs are both nocturnal, the slug is not.

I've got pics of one crab...he's black and white, smooth, and seems to eat mostly coraline algae. He does, however, move my frags around if they're in his way, sometimes knocking them to the bottom of the tank. What is he and should he be taking up permanent residence in my sump?

Crab 1.jpg

Crab 4.jpg

Crab 6.jpg

The other crab (pics as soon as I can take them) is a little hairy, beige and white, long legs, small body, pointy little claws with black on the tips. We'll talk more about him when I get the pics.

To the slug, is he trouble? I haven't been able to find anything about him. He is pretty small and has been hanging out on a piece of live rock, and appears to be eating algae. He's green and yellow.

Slug 2.jpg
Slug 4.jpg


Any help will be greatly appreciated, ladies and gentlemen. It's so nice to have a home here.

Thanks in advance.

[dfurbee]

Both need to be moved to the sump. The second crab sounds like a gorilla crab?? Hard to tell without a pic.

[spanko]

I would move the crabs to the sump if they were in my tank. The snail may be a Stomatella varia. Does it look like this?

[freefallingegg]

He's not stomatella. He has no shell...not even a very small one. He actually has ruffles on his back like a lettuce nudibranch does. They have those at the LFS where I bought the rock he came in on. Is it possible he's a baby lettuce?

On another note, one crab down, one to go. I almost got the one in the pics, but I jumped the gun and he escaped my nets. I haven't seen him since.
I did, however, get the one that isn't pictured. He's in the quarantine tank until I can get decent pics of him...then we'll decide his fate from there.

Thanks again.