Other species include barbel, roach, dace, rudd, perch, chub, bream and tench. The river is host to fish, including trout, grayling, perch, chub, roach and dace. Brown Trout, Grayling, Barbel, Chub, Roach and Perch. It is not uncommon to catch rainbow trout, brooke trout, whitefish and chub. The River Windrush supports species including trout, chub and crayfish. Northern pike, perch, and chub all can be caught on lampreys. Endangered fish in the river include the humpback chub and the razorback sucker. The European chub "(Leuciscus Cephalus)" is known to cross-breed with roach, rudd and possibly bream. This species of mackerel closely resembles the Atlantic chub mackerel. Fly fishing techniques may also be used for certain species, such as grayling or chub. Blue mackerel are often mistaken for chub mackerel. Chub mackerel migrate long distances in oceans and across the Mediterranean. Isolated valley drainages support endemic fish, such as the Newark Valley tui chub. The ideal method for catching chub mackerel is round-haul gear such as purse seines. It was originally thought to be a subspecies of the chub mackerel "Scomber japonicus colias".