Nudibranch Species

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Opistobranchs Categories

Nudibranchs, Seaslugs, Seahares, Pleurobranchs, Polybranchs

Nudibranchs are a group of soft-bodied marine gastropod molluscs that shed their shells after their larval stage. They are noted for their often extraordinary colors and striking forms.

Currently, about 3,000+ species of nudibranchs are known in the world, with over 500 so far known in Philippines

The word “nudibranch” comes from the Latin nudus “naked” and the Ancient Greek bránkhia “gills, and you can see their naked gills or plumes on their backs, which makes them so unique. 

Seahares, sap-sucking seaslugs, Pleurobranchs and polybranchs are often mistaken for nudibranchs, but since they are closely related and all opistobranchs, they will also be listed in this ID guide.


More marine species identifications