Average annual salary for a Marine Biologist is $53681 based on statistics in the U.S. as of 2015. The highest salary recorded was $111942. The lowest salary reported was $27148. These figures will vary on a state to state basis as these are averages across all 50 states. Median hourly wage for a Marine Biologist is $26.69 based on statistics in the U.S. as of 2015.