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BLUE FISH TOURNAMENTS
Blue Marlin
An extremely impressive fish, the blue marlin weighs at least 180 kg (400 lb) on average and can be more than twice as heavy. It has the elongate, rounded snout common to all members of the family Istiophoridae, with which it is thought to stun prey such as schooling fishes and squid. Blue marlins are among the fastest of all fishes and have perfectly streamlined bodies and the high, crescent-shaped tails characteristic of the high-speed species. They make regular seasonal migrations, moving toward the equator in winter and away again in summer.
Size: largest of the Atlantic marlins, common to 11 feet, known to exceed 2,000 pounds
Japanese longliners report that the blue marlin is the largest of the istiophorid fishes. It apparently grows larger in the Pack. All giant marlins are females, and male blue marlin rarely exceed 300 16 (136 kg). The pectoral fins of blue marlin are never rigid, even after death, and can be folded completely flat against the sides. The dorsal fm is high and pointed anteriorly (rather than rounded) and its greatest height is less than the greatest body depth. The anal fin is relatively large and it too is pointed. Juveniles may not share all the characteristics listed above, but the peculiar lateral line system is usually visible in small specimens. In adults it is rarely visible unless the scales or skin are removed. The lateral line of a Pacific blue marlin is a series of large loops, like a chain, along the flanks. The lateral line of an Atlantic blue marlin is a reticulated network that is more complex than the simple loops of the Pacific specimens. The vent is just in front of the anal fin, as it is in all billfish except the spearfish. The back is cobalt blue and the flanks and belly are silvery white. There may be light blue or lavender vertical stripes on the sides, but these usually fade away soon after death, and they are never as obvious as those of the striped marlin. There are no spots on the fins.
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