The 8-inch, bright pink slug has been isolated in a "sky island" for millions of years.

And among the octopus and schools of fish, there they are: tiny, powerfully cute, neon-colored sea slugs. Nudibranchs (pronounced various ways, including NEW-duh-branks) are a family of sea slugs.

Sea slugs, also known as nudibranchs, are actually shell-less molluscs, according to the Natural History Museum in London. In some cases, they come in neon colors and dragon-like shapes ...

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.