Small banded brittle starfish

[tmbar19]

I have a 34 gal. with oodles of little blue/green banded brittle starfish. They seem to reproduce quite rapidly, and I believe only grow to about 3". Can anyone tell me more about these little pygmys? I used to have a serpent starfish, but I'm pretty sure that these are an entirely, much smaller, species. I love them in my Max biocube, but have a large number of them. Should I try to sell them?
Thanks,
Marianne 403-722-3544 Caroline, Alberta