Hermissenda crassicornis. The lines in the middle of each cerata are part of the digestive system, and the stinging cells are stored at the tip of each cerata. Photo by M. LaBarbera

Hermissenda crassicornis
San Juan Island, WA
Argyle Lagoon
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia

clade Euthyneura
clade Nudipleura
clade Nudibranchia
clade Dexiarchia
clade Cladobranchia
clade Aeolidida
Superfamily: Aeolidioidea
Family: Facelinidae

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