Istiophoridae

Indo-Pacific sailfish

Istiophorus platypterus

A towering sail and long beak at sea

• Blue
• Gray
• Silver
• White
• Tropical
• Globally widespread
• Marine fish
• Fusiform
• Compressed cross-section
• Large
• Tropical fish

Celebrated across the globe for its magnificent sail-like dorsal fin and breathtaking burst speed, the Indo-Pacific sailfish is one of the fastest and most spectacular pelagic billfishes traversing tropical oceans. Its long, slender body presents a dark metallic blue back with cobalt-blue vertical bars lighting up its silvery flanks when hunting, while the prolonged, rounded spear-like rostrum dominates the snout. The definitive anatomical signature is its immense, sail-like first dorsal fin, which towers significantly higher than its body depth and is spangled with small black spots; during high-speed swimming bursts exceeding one hundred kilometres per hour, this sail folds flat into a streamlined dorsal groove. Ranging across tropical and subtropical expanses of the Indian and Pacific Oceans from coastal drop-offs to open oceanic currents, it hunts schooling sardines, mackerels, flying fishes, and squids. Raising its sail to herd and corral prey balls, it delivers lightning-fast sideways bill slashes to stun victims. Maximum recorded total length reaches three hundred and forty-eight centimetres.

Sources: NOAA Fisheries — Pacific Sailfish, Istiophorus platypterus