Slugs - Tropical Reef Guide

Nudibranchs, also known as sea slugs, are some of the most beautiful and diverse creatures in the ocean.There are over 3000 described species worldwide. Nudibranchs are essentially snails without shells, and their name literally means "naked gill". In most species, the gills are prominently displayed on their dorsal surface. Sea slugs have a pair of tentacles located on top of their heads, which biologists believe are used as sensory organs to assist in finding food and seeking a mate. Many nudibranchs are brilliantly coloured while others are subtly coloured to match their background, thereby providing camouflage.

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