This close-up image shows a colorful nudibranch gliding gently through marine vegetation. Known for their stunning colors and delicate forms, nudibranchs are among the most fascinating creatures in ...

Frogfish are some of the most colorful creatures under the sea — and some of the most unique, too. They look more like frogs than fish with their leg-like fins and their quick-snapping jaws, but they ...

Swimming through the crystal blue waters surrounding the Galapagos Islands, divers watched the hubbub of life on the coral reef. A "large," colorful sea creature with "spectacular" blue fins caught ...

When we think of slugs, we often picture slimy brown garden creatures. Under the sea, however, you can find slugs so colorful and unique they seem to have been transplanted from another planet ...