Free Online Marine Biology Courses & MOOCs

Coursera

University of Alberta

Paleontology: Ancient Marine Reptiles (Coursera)

Science

Dive into the prehistoric past and uncover the secrets of ancient marine reptiles with our Paleontology: Ancient Marine Reptiles course. This engaging four-lesson program offers an in-depth look at how air-breathing terrestrial animals adapted to life in the water, leading to the evolution of diverse species such as ichthyosaurs, plesiosaurs, and mosasaurs. Whether you're a student, educator, or lifelong learner, this course will provide you with a comprehensive understanding of these remarkable creatures.

Jun 10th 2026

4 Weeks

Evolution Marine Biology Animals

Coursera

American Museum of Natural History

Marine Biology (Coursera)

Sci: Environment

Dive deep into the mysteries of the ocean with our comprehensive Marine Biology course. From the surface to the deepest depths, explore the incredible diversity of marine life, their evolutionary history, unique adaptations, behaviors, and the challenges they face in today's world. This course is perfect for anyone interested in the wonders of the sea.

Jun 8th 2026

5-12 Weeks

Oceans Marine Life Marine Biology

Saylor Academy

Saylor.org

Marine Biology (saylor.org)

Sci: Biology & Life Sciences

Discover the wonders of the ocean with our Marine Biology course. Delve into the intriguing lives of marine organisms, their adaptations to salt water, and how they thrive under immense pressure. This course offers a comprehensive understanding of ocean ecosystems, biodiversity, and the interplay between various biological disciplines in the marine environment.

Legacy Course

Self-Paced

Biology Water Marine