Tetraclita rubescens, commonly known as the pink volcano barnacle, is a species of sessile barnacle in the family Tetraclitidae.
Pink volcano barnacles are a large species, with a ruddy colouration and shell comprising four plates. Their diameter, at the base, measures from . The barnacles produce several hundred nauplii per brood, which they have two or three of each mating season, when they reproduce by copulation. The nauplii then live pelagically for a few weeks. Reaching sexual maturity after two years, the barnacles can live up to fifteen years. The barnacles are found on the southwestern Pacific coast of North America.
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