A member of the small Percopsidae family, the confusingly named trout-perch is neither a trout nor a perch, nor is it of angling significance, although it is an important forage species for predators.
IdentificationThe trout-perch derives its name from a superﬁcial resemblance to a trout, by virtue of having an adipose ﬁn, and to a yellow perch or a juvenile walleye by its body conﬁguration. It has a fairly deep cylindrical body with a narrow caudal peduncle, large eyes, and a large unscaled head that is ﬂattened on the underside.
Its color is transparent yellow olive with silver ﬂecks above, and rows of dusky spots appear along the back and the sides. A related species, the sandroller (P. transmontana), is smaller and slightly darker, with a more arched back. Size. This species reaches a maximum length of 6 to 8 inches; 3 to 5 inches is common.