In relation to their parasitic habit one or two suckers are always developed, the one at the anterior and the other at the posterior end of the body.
Other genera are Aglauropsis, Gossea and Gonionemus; the last named bears adhesive suckers on the tentacles.
The fore-legs of many male dyticids have the three proximal foot-segments broad and saucer-shaped, and covered with suckers, by means of which they secure a firm hold of their mates.
Buffalo-fish, paddle-fish, cat-fish, drum, crappie, black bass, rock bass, German carp, sturgeon, pike, perch, eels, suckers and shrimp inhabit the waters of the Mississippi and its tributaries, and oysters, shrimp, trout, Spanish mackerel, channel bass, black bass, sheepshead, mullet, croakers, pompano, pin-fish, blue-fish, flounders, crabs and terrapin are obtained from the Mississippi Sound and the rivers flowing into it.
Suckers afford the strongest and earliest-bearing plants.
