pteraeolidia

flickr

Dali moustache - Pteraeolidia ianthina - Blue dragon #marineexplorer by John Turnbull
Via Flickr:
Bare Island

Pteraeolidia ianthina

…a strikingly marked species of of Facelinid nudibranch which is known to occur among shallow coral reefs throughout the Western Pacific Ocean, from Hawaii to the Philippines, to the waters of northeast Australia and parts of New Zealand. It is also known from the Red Sea. P. iathina is known to feed almost exclusively on hydroids, generally those which contain Symbiodinium spp. These dinoflagellates are “farmed” in the digestive diverticula of P. iathina allowing the sugars they photosynthesize to be used. 

Classification

Animalia-Mollusca-Gastropoda-Heterobranchia-Euthynerua-Nudipleura-Nudibranchia-Dexiarchia-Cladobranchia-Aeolidida-Aeolidioidea-Facelinidae-Pteraeolidia-P. ianthina 

Image: Richard Ling

On that topic, people often think that Goodra is partly based on this blue sea dragon sea slug, Glaucus atlanticus

but that looks nothing like Goodra

Understandably, It’s probably because the Glaucus atlanticus is really well known, i.e. it IS the dragon slug you first think of when you hear the words dragon + slug.

However, confusingly (and wonderfully)  there is another group of aeolid nudibranch sea slugs called blue dragons, the Pteraeolidia 

Which not only match Goodra’s colour scheme excellent but are called dragon sea slugs too!

Another closely related group also looks like our fave gooey dragon, the Phyllodesmium sp.

Anyway nudibranchs are SUPER COOL BRO