Job hunting as a biologist can be an extremely painful and time-consuming experience. I have listed some of my favorite job search websites below, which might help you get started if you are having trouble. If you have found other great websites that are not specifically listed, please feel free to comment/share!
USAjobs – government employment
CO State University’s Warner College of Natural Resources – List of biology job boards
Marine Careers – List of marine-related job boards
Marine Conservation Institute – List of marine conservation job boards at the bottom
MARMAM listserv – If you are interested in marine mammals, I would strongly suggest subscribing to the MARMAM email list. They send out announcements about new publications and include job postings, many of which I do not find in other locations.