aeolidioidea

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Spanish shawl (Flabellina iodinea)

is a species of aeolid nudibranch native to the west coast of North America, parts of central america and the Galapagos. The Spanish shawl is easily recognizable due to its stunning purple and orange coloration, these bright colors serve as warnings to potential predators that the cerata (orange appendages) are filled with dangerous stinging cells stolen from the cnidarians that they prey on. 

Phylogeny

Animalia-Mollusca-Gastropoda-Aeolidioidea-Flabellinidae-Flabellina-iodinea

Image Sources: 1,2

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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

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Berghia coerulescens

…a species of aeolid nudibranch that is native to European, Mediterranean, and Caribbean waters. B.coerulescens is usually found in temperate and warm waters in depths of around 1 meter. Like other nudibranchs this species typically feeds on sessile marine invertebrates and favors sea anemones.

This species is sometimes used in the aquarium trade to deal with anemone pests (members of the genusand Aiptasia).

Phylogeny

Animalia-Mollusca-Gastropoda-Aeolidida-Aeolidioidea-Aeolidiidae-Berhia-B.coerulescens

Images: Dominique Horst and Parent Gery