See this incredible species of seal slug known for their bright colours and distinctive shapes. | National Geographic UK

16K views · 337 reactions | A super tiny sea animal - sea slug - Costasiella sp. is feeding on the algae. A body length of this creature is approximately 5mm!!!  The video was taken at a depth of 15m. 錄 Lighting ➡️ Big Blue Dive Lights Hong Kong Headquarter Tulamben, Bali, Indonesia  With AOI-uw Divesea Indonesia Many thanks for watching, lovely people ❤️❤️ | Yury Ivanov | Facebook

11K views · 379 reactions | A tiny marine animal - sea slug - Favorinus mirabilis is feeding on eggs of another sea slug  The body length of this creature is approximately 7mm  The video was taken at a depth of 15m 錄  Tulamben, Bali, Indonesia  | Yury Ivanov | Facebook

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