Does catch-and-release fishing hurt the fish? [I Have Gone Fishing]

Well, going fishing, really. Im being driven to the lake right now. To be honest though, I'm really scared. I'm an animal lover of sorts, and I really really really don't want to hurt any fish. If we were going to eat them in the end, I'd feel a little better, since I eat meat all the time, but we're not. We're just gonna catch em and release em.

I suppose it's good we don't plan to kill them and just pretend it never happened, but wouldn't the books hurt the poor fish? I don't want to just injure a fish and throw it back while its still in pain. It just seems so terrible and I don't want to do it Some say fish don't feel pain cause of their undeveloped brains, but I don't think that's true.

I wouldn't have gone, but my parents made me because its for a merit badge for Boy Scouts. I convinced them to not make me go, but then I had second thoughts. I called and said I do want to go, but then changed my mind a few minutes later. They already told the other guys to wait though and my dad was coming to pick me up, so I had no choice.

I dont want to hurt any fish, I really don't. I don't think I'm gonna like this trip.