Most novices who visit the seashore and see barnacles growing on rocks may confuse them with mullosks because of their hard shells. Many never know the barnacles are alive, but once you have seen them in an aquarium than you will never question whether they are alive or that they are crustaceans.
Ar-1230 CORD GRASS BARNACLE, Chthamalus fragilis, a tiny, flattened fragile form that lives on Spartina.
Per collection: $27.50
Ar-1240 IVORY BARNACLE, Balanus eburneus, a large, white barnacle that grows on wharf pilings. On high tides the shells open, and the feathery cirri rhythmically sweep the water for particles of food. When the tide drops the cirri are retracted, the shell plates close. This species has been successfully cultured in closed system aquariums. The eggs hatch and are brooded up to the nauplius stage within the mantle cavity of the barnacle. Larvae may be removed with a pipette. Size: 1-2 cm.
Per 100: $61.50
Ar-1250 CRAB BARNACLE, Chelonibia patula, a large, flat barnacle, epizootic on crabs and diamondback terrapins. Basal ramifications extend into the integument of its host. Shipped attached to crab, it usually outlasts all other barnacles in a closed system. Size: 1-2 cm.
Ar-1270 SEA WHIP BARNACLE, Balanus conopea galeatus, gorgonian barnacle, lives embedded in the colony.
Ar-1290 SACCULINA, Loxothylacus texanus, a degenerate parasitic barnacle that attacks crabs, Callinectes sapidus, sending branching roots throughout their bodies. This alters sexual characters and prevents molting in the crab. The barnacle is reduced to little except reproductive and absorptive tissues and represents parasitic modification at its most extreme form. Don’t just look at the textbook drawings; order the living animal attached to its host crab. Sporadically available.