From red to white to orange to blue, fish flesh can land almost anywhere on the color spectrum. What's behind this huge variation? A lot of things — from genetics to bile pigments. And parsing the ...

Return of the Rainbow Fish Marcus Pfister's famous fish stars in a crop of new titles. In the paper-over-board Rainbow Fish and the Sea Monsters' Cave by Pfister, the big blue fish and the little blue ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Far beneath the ...

The ghost catfish transforms from glassy to glam when white light passes through its mostly transparent body. Now, scientists know why. The fish’s iridescence comes from light bending as it travels ...

♪ Good morning to a brand new day ♪ ♪ Time to learn and games to play ♪ ♪ Learning things is so much fun ♪ ♪ Learning is good for everyone ♪ (upbeat music) - Hello, little learners. Welcome back to ...

A lingcod, location unknown; blue lingcod fillets. From red to white to orange to blue, fish flesh can land almost anywhere on the color spectrum. What's behind this huge variation? A lot of things — ...