What kind of fish is this?

I recently bought a piece of live rock from a local LFS. The guy packed it up for me and i was on my way. I got home about an hour later and unwrapped the rock upon inspecting it at home i noticed something sticking out of the rock that looked like a worm. I poked it and this fish fell out onto my floor. Somehow after an hour with no water this little guy is still alive. Problem is i have no clue what it is or how to really take care of it. I tried looking on online fish stores but i couldnt find anything like it. Can someone please tell me what kind of fish this is?