Marine Biology could be a good way to go. I see you're from the Northeast, Woods Hole in MA is legendary when it comes to marine biology- UCSD and UCSB in California have epic marine biology programs, a biology degree can go a long way- Whatever you do, you'll probably change your mind ten times in the next few years, but if you have the opportunity, get your degree, that will open doors in whatever you want to do- Even if your degree isn't specifically what you're targeting, it will put you head and shoulders above others going for the job you want- like others said, even if your career isn't in the fishing industry, it's nice to be able to afford fishing when and where you want to. Good luck, you're definetly on the right track!

Guys like Ken Cook have learned a lot from the biology side and had epic fishing careers; lots of opportunity in aquaculture and stuff as well- It's a big world full of hungry people who will pay to eat fish!!