An unusual new species of deep-sea animal. “Everyone in the control room let out a loud ‘Oooooh!’ at the same time. We were all enchanted by the sight,” Steven Haddock, a scientist with the Monterey ...

1. By Helen Sullivan Photographs by Michael Aw Imagine dragons—or go for a dive in the Pacific Ocean and keep an eye out for this astonishing two-inch sea slug known as Goniobranchus sp.

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.

a species of sea slug that looks as though it were dropped into the ocean from outer space. Improbably, the work would prove foundational to our understanding of how humans learn about the world ...

Scientists have discovered the ultimate case of regeneration: Some decapitated sea slugs can regrow hearts and whole new bodies. This “wonder of nature,” reported in a biology journal on ...