Got Crabs?

[jimsflies]

Here are two crabs I found while taking down my tank. The funny thing about these crabs is they must have come in very tiny as hitchhikers. I rarely buy any large colonies on rocks. Most everything I have bought is on a small chunk of rock or frag plug.

Any idea what kind they are? (Thanks to Beakerbob for taking the pics!)

First crab....black...but looks like a mutant emerald crab. Is it possible that an emerald morphed from green to black?



Second crab...almost had the tank completely emptied and noticed a little movement on the bare bottom. Little sucker "curled" right up and grabbed onto some polyps and didn't want to release. Finally got him to let go. Maybe a gorilla crab?

[ReeferRob]

Creepy, all I know is if its a black crab or has black claws it's bad news.

[jimsflies]

I don't know ...I don't trust that one on the bottom. He has shifty beady little eyes!

[Lovrdwngs]

The top one is a black mithrax for sure, well known as bad news, I had one a very small one that disappeared in a tank move, but once he was gone my zoo's started to multiply instead of disappear!