The northern pike (known as the pike in Britain, sometimes known as jack / jackfish in Canada), Esox lucius, is a species of carnivorous fish of the genus Esox (the pikes). They are typical of brackish and freshwaters of the northern hemisphere (i.e. holarctic in distribution). They are also known by the literal translation of their Latin name, "water wolf".
The wels catfish is a scaleless fresh and brackish water catfish recognizable by its broad, flat head and wide mouth. The mouth contains lines of numerous small teeth, two long barbels on the upper jaw and four shorter barbels on the lower jaw. It has a long anal fin that extends to the caudal fin, and a small sharp dorsal fin positioned relatively far forward. It uses its sharp pectoral fins to capture prey.
SalaulThe scientific name is Sander lucioperca (or Stizostedion lucioperca), and it is closely allied to perch. Zander are often called pike-perch as they resemble the pike with their elongated body and head, and the perch with their spiny dorsal fin. Zander are not, as is commonly believed, a pike and perch hybrid. In Europe, a second species (Lucioperca wolgensis) is limited to rivers in southern Russia and the basin of the Danube.
The European perch (Perca fluviatilis) is a highly predatory species of perch found in Europe and Asia. In some areas it is known as the redfin perch or English perch, and it is often referred to by the shortform perch. The species is very popular and has been widely introduced beyond its native area, into Australia, New Zealand, and South Africa. They have caused substantial damage to native fish populations in Australia.
The Asp is an European freshwater fish of the Cyprinid family. Normally asps are between 10 to 80 centimeters in length, with some reaching 120 centimeters, and weighing up to 12 kg. It inhabits lakes and lower reaches of rivers and estuaries. In spring, in April-June, the asps migrates from lakes to streams for spawning.
The Common carp or European carp (Cyprinus carpio) is a widespread freshwater fish most closely related to the common goldfish (Carassius auratus), with which it is capable of interbreeding. It gives its name to the carp family Cyprinidae. Common carp are native to Asia and Eastern Europe. It has been introduced into environments worldwide, and is often considered an invasive species.