Anybody know the species of this guy and info

[BryanCaruso]

 

[Sk8r]

Looks like a sea cucumber.

 

[AlSimmons]

This link might help.

http://www.advancedaquarist.com/2003/1/inverts

 

[Ron Reefman]

I collected a sea cucumber that looks almost just like that one at the beach last week. If your tank is mature and you have a good sand bed it should do OK. I have a yellow one that is similar that I collected in the Keys while snorkeling. It was about 2" to 3" long when collected and now 3+ years later it's about 8" to 10" long and does a nice job of helping to keep the sand clean.