Fish diurnal

Fourwing Flyingfish

Hirundichthys affinis

Witness the spectacular 'flight' of the Fourwing Flyingfish, a shimmering acrobat of the tropical Atlantic. These unique fish use four specialized fins to glide above the waves at speeds reaching 35 miles per hour.

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Quick Identification

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Size

Typically 20-30 cm (8-12 inches) in length; weighing up to 0.5 kg (1.1 lbs).

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Colors

Iridescent dark blue to greenish-blue on the back with a brilliant silvery-white belly; pectoral fins are dark with a clear trailing edge.

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Key Features

Four 'wings' created by enlarged pectoral and pelvic fins
Deeply forked tail with a significantly longer lower lobe
Large, dark eyes positioned for surface hunting
Streamlined, cigar-shaped body designed for high-speed swimming.

When You’ll See Them

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Activity pattern diurnal

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Peak hours Daylight for feeding and gliding; highly active at night around light sources.

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Season Year-round, with peak sightings typically occurring between February and July during spawning.

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Diet A surface feeder that primarily consumes zooplankton, including small crustaceans like copepods, as well as fish larvae and tiny floating organisms.

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Habitat Pelagic zones of tropical and subtropical waters, frequently found in the Caribbean and Western Atlantic; often congregates near floating seaweed.

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Behavior

The Fourwing Flyingfish is a marvel of marine evolution, famous for its ability to escape underwater predators by launching itself into the air. Using its powerful tail to vibrate against the water's surface up to 50 times per second, it generates enough lift to glide over the waves. Unlike some other flyingfish species, the Fourwing utilizes both its large pectoral fins and its pelvic fins, providing extra stability and longer flight distances that can exceed 600 feet.

These fish are highly social and are typically found in large schools, which provides safety in numbers from predators like tuna, swordfish, and mahi-mahi. They spend most of their lives in the top layer of the ocean, feeding and spawning. While they are usually found in the open sea, they frequently move toward coastal areas during the spawning season, where they attach their sticky eggs to floating debris or mats of Sargassum seaweed.

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Camera Tips

Capturing the Fourwing Flyingfish requires a unique setup compared to land-based wildlife. Since these fish are pelagic, the most successful 'backyard' captures happen from coastal docks, piers, or boat-mounted systems. Use an action camera with high-frame-rate capabilities (at least 60fps, though 120fps is ideal) to slow down their incredibly fast exit from the water. A polarizing filter is an absolute must-have accessory; it cuts the ocean's surface glare and allows the camera to see the fish just before they break the surface.

For the best results, mount your camera about 2-3 feet above the waterline on a sturdy piling or rail, angled roughly 30 degrees toward the horizon. If you are in an area with floating Sargassum or seaweed mats, focus your camera there. Fourwing Flyingfish are drawn to these mats to lay eggs, making them much more likely to loiter in the frame. Avoid using traditional motion triggers unless they are specifically designed for high-speed marine movement, as the waves can cause constant false triggers; instead, use 'looping' mode or time-lapse video settings during peak morning hours.

If you are observing from a shore-side property at night, you can use a powerful LED 'green light' submerged just below the surface or shining directly onto the water. Fourwing Flyingfish are phototactic, meaning they are naturally drawn to light. They will often congregate in the glow to feed on attracted plankton, providing a perfect opportunity for close-up shots. Be sure to set your shutter speed high even at night to prevent motion blur, as these fish are constantly in motion.

Similar Species

Species that look similar or are commonly confused with Fourwing Flyingfish.

Blue Flyingfish

Much smaller pelvic fins, giving them a 'two-wing' appearance rather than four.

Blackwing Flyingfish

Features much darker, almost black pectoral fins and is typically found in deeper oceanic waters.

Frequently Asked Questions

They are primarily diurnal (active during the day) for feeding and social interaction, but they are frequently seen at night because they are attracted to artificial light sources near the water's surface.

The most effective way to attract them at night is with a submerged or surface-aimed green LED light, which draws in the plankton they eat. During the day, they are attracted to floating mats of seaweed or debris which they use for cover and spawning.

Their diet consists almost entirely of zooplankton, including tiny shrimp-like crustaceans called copepods, and the larvae of other marine species found near the ocean surface.

They are only found in coastal marine environments. While you won't find them in a typical inland backyard, they are extremely common sights for residents with oceanfront property or those living near Caribbean and Atlantic piers.

Look at the fins: the 'Fourwing' (Hirundichthys affinis) has both large pectoral fins and significantly enlarged pelvic fins, whereas 'Two-wing' species have only the large pectoral fins.

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