Not a nudibranch, but closely related

Hydatina physis, the rose petal bubble shell, is an ophistobranch, belonging to a group of sea molluscs that includes bubble shells, sea hares and nudibranchs, among others.

This one, with an egg mass, was found in a shallow pool at Woody Head. This creature specialises in eating certain polychaete worms. It incorporates toxins from the worms for use in its own defence.

Hydatina physis at Woody Head, with its own egg mass

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One Response to Not a nudibranch, but closely related

  1. Pingback: Alive, alive-o! | A-roving I will go

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