Tautog \Tau*tog"\, n. [The pl. of taut, the American Indian name, translated by Roger Williams sheep's heads, and written by him tauta['u]og.]

(Zo["o]l.) An edible labroid fish (Haitula onitis, or Tautoga onitis) of the Atlantic coast of the United States. When adult it is nearly black, more or less irregularly barred, with greenish gray. Called also blackfish, oyster fish, salt-water chub, and moll. [Written also tautaug.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Chub \Chub\, n. [This word seems to signify a large or thick fish. Cf. Sw. kubb a short and thick piece of wood, and perh. F. chabot chub.]

(Zo["o]l.) A species to fresh-water fish of the Cyprinid[ae] or Carp family. The common European species is Leuciscus cephalus; the cheven. In America the name is applied to various fishes of the same family, of the genera Semotilus, Squalius, Ceratichthys, etc., and locally to several very different fishes, as the tautog, black bass, etc.

Chub mackerel (Zo["o]l.), a species of mackerel (Scomber colias) in some years found in abundance on the Atlantic coast, but absent in others; -- called also bull mackerel, thimble-eye, and big-eye mackerel.

Chub sucker (Zo["o]l.), a fresh-water fish of the United States (Erimyzon sucetta); -- called also creekfish.

Source: Webster's Revised Unabridged Dictionary (1913)