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Barnacle - Wikipedia Barnacle adults are sessile; most are suspension feeders with hard calcareous shells, but the Rhizocephala are specialized parasites of other crustaceans, with reduced bodies
What are barnacles? - NOAAs National Ocean Service As the cirri rapidly extend and retract through the opening at the top of the barnacle, they comb the water for microscopic organisms They quickly withdraw into their protective shells if they sense a potential threat
Barnacles - Types, Anatomy, Reproduction, Diet, Lifecycle, Pictures A prominent feature of barnacle anatomy is the penis, which is both retractable and capable of growing up to eight times the body length (the highest penis-to-body ratio in the animal kingdom) On wave-exposed coastlines, however, it tends to be shorter and thicker to withstand strong currents
A Barnacle Attaches for Life (Yes, Theyre Living Crustaceans) Barnacles attach to a surface once and stay put for life Most barnacles, especially the acorn and gooseneck varieties, start life as barnacle larvae drifting in the ocean before transforming into juvenile barnacles and settling down on a hard surface
What Are Barnacles? - American Oceans The anatomy of a barnacle is quite different from other crustaceans Most notably, they reside upside-down within their protective shells, using their modified appendages, called cirri, to capture plankton from the water for feeding
Barnacle | Anatomy, Habitat Reproduction | Britannica Barnacle, any of more than 1,000 predominantly marine crustaceans of the subclass Cirripedia highly modified for sedentary life There are about 850 free-living species (all marine) and about 260 species that are internal parasites of crabs and other crustaceans
What Does a Barnacle Do? How They Live, Eat, and Attach These predators graze on barnacle populations, integrating them into the broader marine food web The hard shells of barnacles provide a protective covering, making them a relatively tough meal for many consumers
Barnacles (Cirripedia): Facts, Habitat, Diet - Ocean Info A Barnacle consumes either animal or plant matter, making its diet omnivorous The majority are suspension feeders, they remain permanently inside their shells, which are typically made of 6 plates, and extend their modified legs into the water column