AITA because I pressured a homeless guy to give me an animal he was going to eat, only to keep it as a pet?

I just want to know. I just got out of prison for 18 years and I'm homeless. Making a ton of friends here though.

One of my new friends had a crawfish he pulled out of the nasty river we all live by. I thought he he was going to keep it as a pet, but I found out he was going to eat it so I threw it back in the river.

I did feel bad, so I went and got it back... and he still intended to eat it. I talked him into giving it to me in exchange for a sushi set the local convenience store has. So I collected cans for a few hours, and bought the set.

I still feel bad about it, because he seemed to really wanna eat the crawfish.

She is doing fine, I named her Nancy.