green bubbles?

[Willow]

the problem with emerald crabs is they get big and can get nasty sometimes. i have a huge one in my tank that hitched in on some coral *cough*jason*cough*. this one is kinda scary looking but so far all it's done is systematically knocked every coral in the tank over, that and oh yeah it's now eating coraline after it finished up all the valonia. all the fish still have their fins though :P i guess i would only add one as a last resort unless you really like having scary crabs in your tank.