Gyrineum roseum (Reeve, 1844)
Rosy triton, 24mm

Gyrineum roseum is moderately common on Marshall Islands lagoon pinnacles and on the seaward reef, usually found under rocks at depths of 6 to 20m. At night it is often seen crawling on the walls of small ledges and caves.

This one has an egg mass deposited on a blade of algae.

Not sure how this happened. This still-living Gyrineum roseum had its spire overgrown with a colonial tunicate, effectively cementing the shell to the undersurface of a rock. How long did that take? How long could he have survived like that? What was he eating? Puzzling. I pulled him free.

Created 5 August 2010
Updated 21 May 2012

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