Barnacle — Free Biology Illustration | GPAI | GPAI

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Barnacle — Free Biology Illustration | GPAI | GPAI

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Barnacle

Barnacle

Biology

Barnacle

A single small sessile marine barnacle attached by a flat base, with a rough volcano-like conical shell composed of overlapping interlocking calcareous plates in white to pale gray or tan. The segmented shell surrounds a small circular central opening at the top, formed by opercular plates; the opening may appear dark, with feathery jointed cirri faintly visible or extending outward.

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