Opaleye Nudibranch — printable fact sheet

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Opaleye Nudibranch

Hermissenda opalescens

The Opaleye nudibranch is a strikingly colorful sea slug, easily recognized by its opalescent blue lines and orange-tipped cerata that cover its translucent white body. Found in the intertidal and subtidal zones along the Pacific coast of North America, this nudibranch is admire…

Classification

Invertebrate

Family

Facelinidae

Habitat

Rocky intertidal and shallow subtidal zones along the Pacific coastline

Diet

Carnivore

Conservation status

Least Concern

Lifespan

1-2 years

Weight

1-3 grams

Scientific name

Hermissenda opalescens

Did you know?

The Opaleye nudibranch's scientific name, Hermissenda opalescens, refers to its iridescent, opal-like colors.
Opaleye nudibranchs can incorporate stinging cells from their prey into their own tissues for defense. Their brilliant blue and orange coloration serves as a warning to predators. They are also known for their relatively fast movement compared to other nudibranchs.

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