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Tetraclita rubescens, commonly known as the pink volcano barnacle, is a species of sessile barnacle in the family Tetraclitidae. [1] [2] [3] Pink volcano barnacles are a largeish species, with a ruddy colouration and shell comprising four plates. Their diameter, at the base, measures from 20–50 millimetres (0.8–2.0 in).
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Cutaway diagram of a barnacle, with antennae highlighted by arrow. Crustaceans bear two pairs of antennae. The pair attached to the first segment of the head are called primary antennae or antennules. This pair is generally uniramous, but is biramous in crabs and lobsters and remipedes.
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Barnacle adults are sessile; most are suspension feeders with hard calcareous shells, but the Rhizocephala are specialized parasites of other crustaceans, with reduced bodies. Barnacles have existed since at least the mid-Carboniferous, some 325 million years ago. In folklore, barnacle geese were once held to emerge fully formed from goose ...
The titan acorn barnacle is a large species with calcareous plates forming a steep-sided cone which grows to a height and width of 5 centimetres (2.0 in). [2] The plates are smooth and are fused together. They are pink and are separated by narrow purple or white radii and the aperture at the top is small.
Tetraclita japonica, the Japanese volcano barnacle, Kurofujitsubo, is a species of symmetrical sessile barnacle in the family Tetraclitidae. [1] [2] Subspecies
Amphibalanus improvisus is found, sometimes in vast numbers, down to a depth of about 6 metres (20 ft) on rocks, man made structures, buoys, ships' hulls, the shells of crabs and molluscs, and certain seaweeds. It has been known to block the water intake pipes of factories and power stations.