It varies quite a lot, depending on if you work for the government or university and if you have a full-time or half-time position. I’d say someone holding a Ph.D. could make any where between 40,000 and 80,000 USD per year. read more
A marine biologist is on salary, so is not paid by the hour. The yearly salary can vary widely. I would say that in the USA the salary would not be lower than 40 to 50 thousand dollars a year. read more
But marine biology covers a wide range of activities and organisms, and so does the job of a marine biologist. Here you can learn what a marine biologist is, what marine biologists do, and how you can become a marine biologist. read more