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Many species of salmon are anadromous and can migrate long distances up rivers to spawn Allowing fish and other migratory animals to travel the rivers can help maintain healthy fish populations. Fish migration is mass relocation by fish from one area or body of water to another. Many types of fish migrate on a regular basis, on time scales ...
The nase has a spindle shaped physique, with a blue-grey metallic-coloured scales and orange tail. It has relatively sharp lower lip. Generally, the fish range from 25 to 40 centimetres (9.8 to 15.7 in) in length, and weigh about 1 kg (2.2 lb).
The skipjack herring (Alosa chrysochloris) is a North American, migratory, fresh- and brackish water fish species in the herring family Alosidae. [3] The name skipjack shad comes from the fact that it is commonly seen leaping out of the water while feeding. [4]
The sauger (Sander canadensis) is a freshwater perciform fish of the family Percidae that resembles its close relative, the walleye. The species is a member of the largest vertebrate order, the Perciformes. [3] It is the most migratory percid species in North America. [4]
A school of fish has many eyes that can scan for food or threats Pacific sardine school reacting to attention from yellowfin tuna. These sometimes immense gatherings fuel the ocean food web. Most forage fish are pelagic fish, which means they form their schools in open water, and not on or near the bottom (demersal fish). Forage fish are short ...
The fish are gregarious, feeding on zooplankton and fish larvae, and are hunted by tuna, marlin, bluefish and cod. It is a migratory fish, moving inshore during the summer and back out into deep water later in the year. Spawning takes place near the surface in the open sea. The eggs have filaments attached and are pelagic. The juveniles inhabit ...
It is a migratory offshore fish and undergoes a daily vertical migration from the surface to the seabed at depths down to about 1,000 m (3,300 ft). It is the object of an important commercial fishery off the West Coast of the United States, and annual quotas are used to prevent overfishing.
Arripis trutta is a streamlined fish with a long and slender body. There is a bony ridge edge of bone beneath and in front of each eye which has obvious serrations in smaller individuals. In larger fish the scales feel smooth. The lobes of the caudal fin are equivalent in length to the head. These fish are dark bluish-green dorsally and silvery ...