Balanus Balanoides -

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

It uses long, feathery appendages called cirri to filter plankton from the water. Habitat and Ecology balanus balanoides

Common threats include whelks (sea snails) and starfish. Life Cycle and Reproduction Adults generally reach up to 15 mm in

Balanus balanoides , now more commonly known by its accepted scientific name , is a widespread species of sessile acorn barnacle. It is a dominant member of the rocky intertidal zones in the North Atlantic and North Pacific. Physical Characteristics balanus balanoides