Week 47: Sea Slugs ('Nudibranch')

Sea Slugs were @SpeciesofUK from 20^th to 26^th January, 2014.

   

Sea slug is a common name given to thousands of marine gastropod molluscs that lack external shells.[1] They are related to our familiar land-dwelling slugs and snails.

Polycera quadrilineata
[Flickr Creative Commons © Frank Gloystein]

The main grouping of sea slugs is the so-called ‘nudibranchs’.[2] It is these that form the subject of this post.