13 Facts About Yellowfin tuna

Yellowfin tuna is a species of tuna found in pelagic waters of tropical and subtropical oceans worldwide.

Yellowfin tuna are epipelagic fish that inhabit the mixed surface layer of the ocean above the thermocline.

Yellowfin tuna prey include other fish, pelagic crustaceans, and squid.

When swimming rapidly, a Yellowfin tuna's fins retract into grooves to form a smooth aerodynamic surface and increase its speed, due to a biological hydraulic system involving the lymphatic system.

Purse-seine vessels locate Yellowfin tuna using onboard lookouts, as was done in the pole-and-line fishery, but they employ sophisticated onboard electronics, sea-surface temperature and other satellite data, and helicopters overhead.

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Purse seining for yellowfin tuna became highly controversial in the late 1970s when it became apparent that the eastern Pacific fishery was killing many spinner dolphins, pantropical spotted dolphins, and other cetaceans that accompany the fish.

Such Yellowfin tuna are often significantly smaller than the larger adult Yellowfin tuna associated with dolphins.

The removal of huge numbers of juvenile yellowfin and bigeye tuna that have yet to reach breeding age has major potential consequences for tuna stocks worldwide.

Yellowfin tuna were subsequently discovered by sport fishermen in Bermuda, the Bahamas, Hawai'i, and many other parts of their range.

Today, yellowfin tuna are a major sport fish pursued by sport fishermen in many parts of the world.

Yellowfin tuna are a popular gamefish among anglers fishing from US Gulf Coast ports, San Diego, and other ports of southern California.

The yellowfin tuna is a highly prized catch in the offshore sport fisheries of South Africa, Australia, and New Zealand.

Sport fishing for yellowfin tuna exists on a smaller scale in many other parts of the world.