aeolidioidea

Glaucus marginatus

…a small species of pelagic aeolid nudibranch in the family Glaucidae, which also houses its more famous cousin G. atlanticus. G. marinatus is commonly seen throughout the Pacific Ocean, where like G. atlanticus it spends its time floating upside down on the ocean’s surface, feeding on colonial cnidarians such as the Portuguese Man of War. 

Classification

Animalia-Mollusca-Gastropoda-Heterobranchia-Euthyneura-Nudipleura-Nudibranchia-Dexiarchia-Cladobranchia-Aeolidida-Aeolidioidea-Glaucidae-Glacus-G. marginatus

Image: dapete

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Hermissenda crassicornis

Sometimes known as the “opalescent sea slug”, H. crassicornis is a species of Facelinid nuibranch which inhabits coastal intertidal zones from Alaska south to Mexico. Like other nudibranch species H. crassicornis feeds mainly on sessile invertebrates, specifically hydrioids and occasionally sea anemones, tunicates, and others. 

Classification

Animalia-Mollusca-Gastropoda-Heterobranchia-Euthyneura-Nudipleura-Nudibranchia-Dexiarchia-Cladobranchia-Aeolidida-Aeolidioidea-Facelinidae-Hermissenda- H. crassicornis

Images: Brocken Inaglory and Jmalin

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