Jan 4, 2018
Nudibranch-Related Fact of the Day #7
There are four main types of nudibranch, Dorid, Aeolid, Arminid, and Dendronotid. Dorids are classified for their pronounced mantle and concentrated ring of gills around their anus.
Aeolids are classified for their cerata, which covers their back.
Arminids are classified for having their gills run along their sides, underneath the mantle.
Dendronotids are classified for having cerata like Aeolids, except they are much more complex and branchy.