Prionotus carolinus
Size:
to 16"
Description:
Sea Robins are distinguished by the three free rays of the pectoral fins, with which the fish can actually walk across the bottom. They make frog-like croaking sounds when disturbed. Sea Robins have razor-sharp gill covers and spines, and are best left alone - there's not much meat on them anyway.
Sea Robins are generally found inshore in harbors and inlets, in 30-40 foot depths, but move out to deep waters in winter.
These creatures are all of the order Gastropoda - having a single, often coiled, shell, as opposed to the bivalves, which have two matching shells. Most snails are hermaphroditic. Also, most snails have a right-hand twist to the shell, although there are exceptions.
Right:
X-ray image of a Channeled Whelk, showing internal structure.
Nudibranchs are a form of snail that has lost its shell, while Corollas and Sea Butterflies are snails that have abandoned not just their shells, but the snail-like existence entirely, swimming up into the water column as plankton.
More: Snails ...
