Can anyone tell me what this is?

[anotherfish]

I got it on a pice of live rock. Have no idea what it is. Anyone else know?

[Rob619]

looks like a sponge

[crabbysd]

nice sponge

[CMD2213]

+1 sponge sometimes it spreads once on frags of zoas and stuff I usually remove it. But not harmful.

[jetli1969]

Sponge or leather!

[anotherfish]

Ya there are two of them both about the size of a dime. I have 5 toadstool leathers though. From the same sorce as the rock.

[crabbysd]

pretty sure there's about 4 different sponges in the picture and maybe a brittlestar. Cool!

[anotherfish]

Nice! I don't see the star in the photo! Lol but there are two (that I know of) in my tank.

That's one of my favorite things about saltwater. I'm always discovering new stuff.

After I got this tank I found a 4 legged star, one of the fish cut him in half. I though he was a goner. Then I found him with three baby legs and 2 other little spec sized ones. So cool!

[crabbysd]

Im on the desk top. Upper right hand corner one maybe 2 legs.

Oh hey just above the big pinky another sponge or a tunicate!