Hermissenda crassicornis

Hermissenda crassicornis is a species of brightly coloured, sea slug or nudibranch, a marine gastropod mollusc in the family Facelinidae.[1]

Hermissenda crassicornis
Scientific classification
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H. crassicornis
Binomial name
Hermissenda crassicornis

Distribution

This nudibranch lives from Kodiak Island, Alaska, to Northern California. It is replaced by Hermissenda opalescens to the south of Northern California.[2]

Habitat

This species is found in various habitats, including the intertidal zone of rocky shores, but also in bays and estuaries.

Description

The species grows to be about 50 mm, or about 2 inches. The colour of this nudibranch varies from one locality to another, but it is always easily recognizable by the orange stripe along its head area and the white stripes on the cerata.[3]

Life habits

This nudibranch feeds on hydroids and other marine organisms such as ascidians and sea anemones. It sometimes attacks other nudibranchs, and will eat smaller specimens of its own species.

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References

  1. Rosenberg, G. (2011). Hermissenda crassicornis (Eschscholtz, 1831). Accessed through: World Register of Marine Species on 2012-06-03
  2. Lindsay, T. & Valdés, Á. (2016) The Model Organism Hermissenda crassicornis (Gastropoda: Heterobranchia) Is a Species Complex. PLoS ONE 11(4): e0154265.
  3. Thomas, C., 2007 (Apr 4) Colour variation in Hermissenda crassicornis. [Message in] Sea Slug Forum. Australian Museum, Sydney.
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