It's an Antennata Lionfish. I was originally going to go with a Volitian, but I decided to not spend $80 on one, and I think I made a good choice. Especially considering that the Lionfish and a couple other fish ended up being free anyways
And I could see how the crab would tear things up... Luckily it's a fish only tank with just sand and reef rocks, so the only thing he can really mess with is the sand... Which is a good thing lol. I'm really enjoying him so far though