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Yellowfin tuna have a body shaped like a cigar which tapers at both ends while thier head is conical. The back of the Yellowfin Tuna is dark brownish blue to dark yellow while becoming gray to whitish on the belly. Identifying between Yellowfin and Big Eye Tuna can be very difficult. The yellowfin tuna has pectoral fins which do not extend past the anal fin; while the bigeye tuna's pectoral fins extend well past the anal fin.
Yellowfin Tuna can be caught here just about year round, but depends on the water conditionas as Yellowfin Tuna prefer water 64 to 86 degrees fahrenheit which is 18 to 30 degrees celsius. The Yellowfin tuna really bite well when the water is around 74 degrees fahrenheit and above. The average weight is from 20 lbs to 40 lbs with the world record at 388 lbs. 12 oz here in Mexico.
The preffered method of fishing for Yellowfin Tuna is by trolling lures, konaheads and plastic squid and can be caught quite often in front of schooling dolphin.