PLEASE don't take this as me knocking marine biology.
But, I'd talk to people who have a degree in Marine Biology.
Because do you know what the best & most realistic job they're gonna have is?
Working at a Zoo/aquarium for crappy money.
(and you don't need a degree to work at one either, I have friends who either have a B.A., a masters or a doctorate in marine biology, and when they apply for positions at zoos, they're competing with people who don't even have an AA)
Unless you plan on being the next Jacques Cousteau, I would never choose to spend 100k+ educating myself in something that doesn't really have any fun jobs with decent pay.
I'd imagine you could make great sums of money with that kind of a degree, helping oil companies with off shore drilling or someone building hydroelectric dams or something, and they'd need an expert so they don't screw up the ecosystem. But that's probably not why anyone would choose marine biology(when i was 13, it was my dream too).
Computer animation wise, what do you mean? 3d like pixar and video games or just regular animation for cartoons?
if you go the 3d animation for games/movies I'll tell you, your job only lasts as long as the project(meaning max like 2 years). Even if you work for someone like pixar or EA, you get hired on as part of a team because with each game/movie thta's made, a producer is put in total charge of a project and since there is soo much stress riding on him, he hand picks people to work for him on this one project that either will make or break him. I don't know anyone making videogames longer than a 5 years stretch (I'm a programmer/designer myself).
If you want to start making cartoons, learn just 2 programs. Adobe Photoshop & Adobe Aftereffects.
This is how Aqua Teen Hunger Force is made. sure it's not the most elaborate animation, but dollar for dollar it is actually the most money-making show on t.v. (I couldn't believe when I read it)
It costs just 50k per episode to make... for all the voice actors, and time spent making it.
But the money it pulls in from advertising (the whole 10-midnight block of adult swim beats freaking Leno even for the 18-34 male demographic
& the inital month each dvd goes on sale, it is the number 1 sold tvshow dvd for that month)
2 guys make the entire thing, and if it weren't for them wanting to pay profesion voice people, they could do everything themselves.