Balanus Balanoides [DIRECT]

Common threats include whelks (sea snails) and starfish. Life Cycle and Reproduction

It thrives in the intertidal zone , where it is regularly submerged and exposed by the tide. balanus balanoides

It is famous in ecological studies for its competition with the barnacle Chthamalus stellatus . While Balanus can outgrow and smother Chthamalus in lower, wetter areas, it cannot survive as high up the shore as Chthamalus due to a lower tolerance for drying out. Common threats include whelks (sea snails) and starfish

The opening at the top is diamond-shaped and protected by four plates that form a "door" to prevent drying out (desiccation) during low tide. While Balanus can outgrow and smother Chthamalus in

Adults generally reach up to 15 mm in diameter , though some records suggest they can range up to 7.5 cm in certain conditions.