Summary from Riley Shepard's Master Book of American Folk Song, p. 296:

CATFISH, THE aka BANJO SAM & THE JACKFISH - Animal song, 1st. [line]

Catfish, catfish, goin' up stream... OR:
Catfish runnin' down de stream... OR:
Catfish swimming down the river... OR:
That old Jackfish swimming up the stream

See: Frank C. Brown Collection vol. 3, p. 220 (which I'll link below)
Dorothy Scarborough, On the Trail of Negro Folk-Songs, 1925, p. 199
Cecil Sharp, English Folk Songs of the Southern Appalachians (see also: here)
Susannah Wetmore and Marshall Bartholomew, Mountain Songs of North Carolina (quoted in Frank C. Brown collection)
Newman I. White, American Negro Folk-Songs, pp. 203, 246

Also see Fresno State's page