Marine Biology


Explore the largest habitat on Earth

Marine biology is the study of life in the ocean, from the smallest microbes to the largest animals to ever live on Earth. It is the collective effort of scientists from many fields to explore, understand, and conserve the diversity of life in in the world's largest ecosystem. Oceans cover 71% of our planet's surface, and provide 99% of its livable habitat by volume. They are the largest space in our universe known to be inhabited by living organisms, yet we know less about the deepest reaches of our oceans than we do about the surface of Mars. This vast marine space is home to an enormous diversity of strange and wonderful organisms, so much so that hundreds of new species are discovered every year. We depend on this biodiversity: 3 billion people rely on marine and coastal biodiversity for their livelihoods, and 2.6 billion people rely on the ocean for their primary source of protein. Human impacts on ocean ecosystems are increasing, and marine biologists are working to understand how sea creatures adapt to changing environments, and develop sustainable solutions. In this blog, we will discuss the latest scientific discoveries, cool critters, and current issues from Earth's living oceans.

Tiny fins making a big splash

The largest animal migration in the world is one you've probably never heard of.

Elan PortnerHeadshot of Elan Portner
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Across the global ocean, billions of small animals undergo a daily commute of hundreds of feet between their daytime habitat in the ocean depths and their nighttime feeding grounds just below the surface of the water. This may not sound impressive compared to the thousands of miles covered during the migrations of whales or birds, but when considered collectively, the migration of these tiny animals blows all other animal migrations out of the water.

Ballet Flippers

Unusual structures on the flippers of humpback whales aid swimming maneuverability

Diana LiHeadshot of Diana Li
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We often associate sleek shapes with fast speed and agility. Think of hawks, tunas, rockets, and even Olympic swimmers. But the flippers of one of the ocean's largest swimmers, the humpback whale, is covered with bumps along the front. Given the trend towards slick, streamlined surfaces, why be bumpy where other animals (and manmade creations) are smooth?

If Squids Could Talk

New video footage shows how the Humboldt squid could use skin patterns to camouflage and communicate

Diana LiHeadshot of Diana Li
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We may never truly know what animals are thinking and saying, but scientists are working to crack the animal communication code. This gets tricky for animals that don’t emit any sound and don’t live in a place that’s easy to see. The Humboldt squid, which lives in the open ocean, falls into both categories, but that didn’t deter researchers at Stanford and National Geographic. In a 2015 study, the team revealed some of the latest gossip among Humboldt squids in their natural oceanic habitat.