Correction: This species is a dorid, not an aeolid. The appendage is a gill plume used for respiration—not a cerata. Unlike other mollusks, these colorful sea slugs don't have shells or gills. | National Geographic

42K views | Who said slugs had to be gross? This rare and colorful rainbow sea slug was discovered in a rock pool along the coast of England. | USA TODAY Video | Facebook

13K views · 225 reactions | See this incredible species of seal slug known for their bright colours and distinctive shapes. | National Geographic UK | Facebook

Wake up, babe. New MBARI species just dropped. 🤩🙌🏽 MBARI researchers have discovered a remarkable new species of sea slug that lives in the deep sea. Bathydevius caudactylus swims through the ocean’s midnight zone and lights up with brilliant bioluminescence. With a voluminous hooded structure at one end, a flat tail fringed with numerous finger-like projections at the other, and colorful internal organs in between, the team initially struggled to place this animal in a group. Because the ani

7.2K views · 297 reactions | Meet the Glaucus atlanticus This is a species of small, blue sea slug, a pelagic aeolid nudibranch, a shell-less gastropod mollusk in the family Glaucidae. These sea slugs are pelagic; they float upside down by using the surface tension of the water to stay up, where they are carried along by the winds and ocean currents Aloha! www.oceandefenderadventures.com | OCEAN DEFENDER - Hawaii | Facebook