You’ve just encountered Doto greenamyeri, and it’s a real weirdo. Nicknamed the donut sea slug for obvious reasons, this nautical nudibranch recently starred in Bryan Blauvelt’s Underwater ...

Clepto sea slugs steal genes from their food and incorporate them into their own DNA. When food in the chilly coastal waters where they live runs scarce, the bright green sea slug snatches chunks ...

This method of protection can keep almost all predators at bay - but not the kaleidoscopically colourful sea slug. Nudibranchs, commonly known as sea slugs, are a group of shell-less marine molluscs.

When these sea slugs eat a certain type of algae they can ... It turns a shade of green and gets its energy from oxygen and sunlight. The fact that it becomes tiny helps, he said.