>Dear Mr.Cooper, > How old do you have to be to become a marine biologist? > > > Sincerely, > MILO9@prodigy.com Amanda, Its not really a function of age but, more a function of education and experience. So in a professional sense, you would need a college level education, so age 22. To specialize, veterinarian, masters degree, add another 2 - 4 years to that so 24 or 26. Hope its going well, Bob Cooper