Do you want to become a marine biologist or an oceanographer?? Well you have to go to collage. (Duh) You can study at a graduate or an under graduate level. We know what your thinking ' more school!' but it's well worth it.  Some of the courses you'll have to take will be of course A LOT of biology, but biology isn't the only course. You'll also have to take physics,mathmatics up to celcious,and geology. Some warnings to you now you'll have to go to school for about 6 yrs. before you get your masters degree. Of course you'll be MUCH better off getting a P.H.D.
If you get a Ph.D.. you'll probably an  additional 7 yr.. of school.(If you have asthma, smoke, or any type of heart or lung problem don't waste 13 yrs.. of your life going to these  courses, at least to become an oceanographer. You have  learn scuba diving also, to become an oceanographer. Which is almost inevitable with these problems. sorry!)All of this is well worth it to become an oceanographer.
 

       Here are some web sites for schools of oceanography

1.  University of North Carolina in Wilmington- www.uncwil.edu

2. University of Hawaii- www.soest.hawaii.edu/

3. Florida State University-www.coaps.fsu.edu/

4. University of California,San Diego-sio.ucsd.edu/

5. University of Rhode Island-www.gso.uri.edu/