Fish

With over 32,000 described fish species, the varieties are endless. Most bony fishes are cold-blooded, covered in scales and breathe using gills—but there are exceptions to all of these rules.  

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Why the Littlest Fish Matter a Whole Lot

A tornado of sardines swirls around diver and photographer Erwin Poliakoff in the Philippines. Credit: Erwin Poliakoff Top predators along the California coast are having a rough year. Recently starving sea lions have showed up on California beaches...

Lionfish on the Loose

The majestic and highly predatory red lionfish ( Pterois volitans ) , native to the Indo-Pacific,...
Cut of Atlantic Salmon on a Plate

Love Salmon? Listen Up.

A beautiful cut of Atlantic salmon, a popular species among seafood lovers that is in severe...

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Chasing a Basking Shark

"Ocean sunfish" by Mark Harris Credit: Mark Harris It was a hot and sunny day, with barely a whiff of breeze. I boarded a boat in Oban, on the coast...
X-ray image of a winghead shark

DIVE DEEPER

X-Rays of Fish Reveal Diversity

Scientists in the Division of Fishes at the Smithsonian's National Museum of Natural History use X-ray imaging to study the...
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