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Yellowfin Tuna Fish

Yellowfin tuna fish

About Yellowfin tuna fish :
The Yellowfin tuna fish scientific name is Thunnus albacares. This fish is a species of tuna found in pelagic waters of tropical and subtropical oceans wide-reaching. Yellowfin is frequently marketed as ahi, from its Hawaiian name ahi even though the name ahi in Hawaiian also refers to the very much correlated to bigeye tuna. Even though the species name albacares might suggest otherwise, the fish generally known as albacore is a remarkable species of tuna, Thunnus alalunga. The yellowfin tuna is now and then referred to as albacora by French and Portuguese fishermen.

Physical features :
The yellowfin tuna is one of the major tuna species, reaching weights of over 400 pounds but is considerably smaller than the Atlantic and Pacific bluefin tunas that can reach over 2,000 pounds and somewhat smaller than the bigeye tuna and the southern bluefin tuna. The next dorsal fin and the anal fin, in addition the finlets among those fins and the tail, are intense yellow, giving this fish its universal name. The second dorsal and anal fins can be very lengthy in mature specimens, reaching approximately as far back as the tail and giving the look of sickles. The pectoral fins are also longer than the correlated bluefin tuna. The chief body is dark metallic blue, shifting to silver on the belly, which has about 20 vertical lines.

Habitat :
Yellowfin tuna are epipelagic fish that live in the mixed surface layer of the ocean above the thermocline. Sonic track has found that though yellowfin tuna, unlike the related bigeye tuna, mostly vary in the top 120 meters of the water column and go through the thermocline moderately, they are proficient of diving to significant depths.

Life history :
Deeper plunging and cruising seems to occur more often in the daytime, changing to shallower swimming at night, possibly in response to the upright movement of prey items in the bottomless dispersion layer. They are usually a schooling fish and live in their immediate school. Though mostly found in deep offshore waters, yellowfin tuna may move toward shore when appropriate conditions exist. Yellow fin could venture well inshore of the continental shelf when water temperature and lucidity are suitable and food is plentiful.

Diet and predation :
Yellow fin tuna victim includes other fishes like, pelagic crustaceans, and squid. Like all tunas their body form is evolved for velocity, enabling them to pursue and confine gripping baitfish such as flying fish, and mackerel. Adults are vulnerable only by the longest hunters, such as toothed whales, mostly the false killer sea whale, pelagic sharks such as the mako, and big blue marlin and black marlin.

Yellow fin tuna fishing :
Current commercial fisheries grasp yellowfin tuna with encircling nets and by industrial loglines. Previously, much of the marketable catch was made by pole and line fishing, using live lure such as anchovy to attract tuna close to the fishing boat that were then taken with bait jigs on powerful bamboo poles. This fishery under attacks infrequently albacore, as well as yellow fin, for canning. Pole and line fishing is still accepted out today in areas such as the Maldives, Ghana, and by a small amount of boats fishing out of the Canary Islands, and the Azores.