As with oceanic-continental convergence, when two oceanic plates converge, one is usually subducted under the other, and in the process a trench is formed. The Marianas Trench (paralleling the Mariana Islands), for example, marks where the fast-moving Pacific Plate converges against the slower moving Philippine Plate.
A bachelor's or master's degree is typically required for entry-level marine biology research jobs, such as those at private research organizations and biotechnology companies. Doctoral degrees are usually required for faculty positions and other jobs that allow you to follow your own research interests.
A bachelor's or master's degree is usually required for most starting marine biological research jobs, but you should also be aware that the usual level of education required to carry out independent research in biology is a Ph.D., so if you are serious about a full-time career and want to organize your own research projects, you should get your doctorate.