Which fish is sometimes called a pike-perch
Esox (see snoek, snook). The English "pike" originally referred specifically to the adult fish, the diminutive form "pickerel" (now used to name some of the smaller pike, "E. americanus" and "E. niger") referring to the young. The walleye ("Sander vitreus") is sometimes called a pickerel, but it is unrelated to the pike, being a member of the perch family (Percidae). Pike are not to be confused with the unrelated pikeminnows (traditionally known as squawfish) of genus "Ptychocheilus" (family Cyprinidae) or pikeperch ("Sander lucioperca") which is more akin to walleye than to pike. Pike are also called "jackfish" in North America and
Northern pike a pike of a similar size, an observation referred to by the renowned English poet Ted Hughes in his famous poem "Pike". Northern pike also feed on insects, and leeches. They are not very particular and eat spiny fish like perch, and will even take fish as small as sticklebacks if they are the only available prey. The northern pike is a largely solitary predator. It migrates during a spawning season, and it follows prey fish like common roaches to their deeper winter quarters. Sometimes, divers observe groups of similar-sized pike that cooperate some to start hunting at the same