Fish crepuscular

Halavi's Guitarfish

Glaucostegus halavi

A master of disguise that blends the grace of a ray with the power of a shark. Halavi's Guitarfish is the sandy-colored ghost of the Indo-Pacific shallows.

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Quick Identification

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Size

Typically 1.2 to 1.7 meters (4 to 5.6 feet) in length; weight can reach up to 20 kg (44 lbs)

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Colors

Uniform yellowish-brown to olive-grey dorsal side with a pale, creamy white underbelly; no distinct spots or markings on the fins

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Key Features

Sharply pointed, wedge-shaped snout
Shark-like body with two large, upright dorsal fins
Flattened head and pectoral disc
Small spiracles (breathing holes) located behind the eyes

When You’ll See Them

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Activity pattern crepuscular

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Peak hours 5-8 PM and 4-6 AM

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Season Year-round

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Diet A benthic feeder that targets crustaceans like crabs and prawns, as well as small mollusks and bottom-dwelling fish.

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Habitat Shallow coastal waters, sandy lagoons, and muddy estuaries, typically at depths less than 40 meters.

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Behavior

Halavi's Guitarfish is a fascinating evolutionary bridge, possessing the flattened head of a ray but the muscular, propelling tail of a shark. They are primarily bottom-dwellers, often spending their days partially buried in the sand or silt to remain invisible to predators like larger sharks. To breathe while buried, they draw water through the spiracles on top of their heads rather than through their mouths on the sandy bottom.

This species is generally docile and poses no threat to humans, as it lacks the venomous tail spine found in many stingrays. Its name is derived from the Arabic word 'halawi,' which translates to 'sweet' or 'confectionery,' likely a reference to its smooth texture or the high esteem in which it was held by coastal fishing communities. They are solitary hunters, patrolling the seabed with a smooth, gliding motion that is highly efficient for covering large areas of the seafloor.

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Camera Tips

Capturing Halavi's Guitarfish requires a specialized approach because they are strictly aquatic and highly camouflaged. For those with 'backyard' access to coastal docks, piers, or seawalls, a submersible camera rig is your best bet. Position your camera in the transition zone where the sand meets a structure or reef edge. These fish use these boundaries as natural corridors for hunting. A weighted 'drop camera' or a camera mounted to a pier piling at a height of 12 to 24 inches off the seafloor is ideal. Angle the lens downward at roughly 30 degrees to ensure you capture the diagnostic wedge-shaped snout and the dorsal fin placement.

Lighting is the most critical technical challenge underwater. Because Halavi's Guitarfish is most active during the twilight hours (crepuscular) and at night, you will need artificial illumination. Avoid high-intensity white lights, which can startle the fish and cause 'backscatter' (reflecting off suspended sand particles). Instead, use red-filtered LED lights or infrared (IR) if your camera supports it. This allows you to observe their natural foraging behavior without the fish fleeing the 'hot spot' of a bright beam. Set your camera to record in at least 60 frames per second (fps) to capture the unique, fluid undulation of their tail, which distinguishes them from the flapping motion of standard rays.

To guarantee a sighting, use a scent-based lure. A perforated PVC tube filled with crushed oily fish or mashed shrimp acts as a powerful attractant. Secure this 'chum pod' approximately three feet in front of the lens. Halavi's Guitarfish have highly developed electro-receptors and a keen sense of smell; they will often follow a scent trail from a distance directly to your camera. If possible, time your recording sessions with a rising tide, as these fish move into shallower flats to feed as the water depth increases.

Similar Species

Species that look similar or are commonly confused with Halavi's Guitarfish.

Giant Guitarfish

Much larger (up to 3 meters) and often features rows of small thorns along the back.

Bowmouth Guitarfish

Has a much wider, rounded snout and a distinct high-arched 'bow' shape to the head.

Common Stingray

Lacks the shark-like tail and dorsal fins, possessing a whip-like tail with a venomous barb instead.

Frequently Asked Questions

They are primarily crepuscular, meaning they are most active during the low-light hours of dawn and dusk, though they may also forage throughout the night.

If your 'backyard' is a coastal property, you can attract them using a scent lure like a mesh bag or perforated tube filled with crushed crustaceans or oily fish scraps near the seafloor.

Their diet consists mostly of bottom-dwelling invertebrates, including crabs, shrimp, and small mollusks, which they crush with their specialized grinding plates.

They are common in shallow coastal waters near human settlements in the Indo-West Pacific, often found near piers and public beaches with sandy bottoms.

Look for the sharply pointed, wedge-shaped snout and the lack of spots on the body. Unlike stingrays, they have two prominent, shark-like dorsal fins and no tail stinger.

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