Fish diurnal

Longhorned Pygmy Devil Ray

Mobula eregoodoo

Meet the ocean's most graceful acrobat: the Longhorned Pygmy Devil Ray. With its signature 'horns' and elegant gliding motion, this small but striking ray is a master of the coastal currents.

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Quick Identification

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Size

Disc width up to 1.3 meters (4.3 feet); weight typically 15-25 kg (33-55 lbs)

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Colors

Dark brown to charcoal grey dorsal (top) side; snowy white ventral (under) side; no distinct shoulder patches

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Key Features

Elongated, horn-like cephalic fins at the front of the head
Double-lobed pectoral fins forming a diamond shape
Small body size for a devil ray
Absence of a stinging spine on the tail

When You’ll See Them

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Activity pattern diurnal

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Peak hours 8 AM - 11 AM and 3 PM - 6 PM, often coinciding with rising tides

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Season Year-round, with increased sightings during seasonal plankton blooms

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Diet Filter-feeds on zooplankton and small pelagic crustaceans using its gill rakers

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Habitat Coastal tropical waters, coral reefs, and shallow bays within the Indo-West Pacific

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Behavior

The Longhorned Pygmy Devil Ray is a highly social and energetic marine species, often found traveling in small groups known as 'fevers.' They are famous for their acrobatic displays, frequently breaching the water's surface in spectacular leaps. While the exact reason for this behavior is debated, experts believe it serves as a form of communication, a way to dislodge parasites, or even a social ritual.

Unlike many other rays that spend their time on the sandy bottom, the Longhorned Pygmy Devil Ray is pelagic, meaning it spends most of its life swimming in the open water column. They are generally shy around humans but possess a natural curiosity, often gliding gracefully through shallow coastal waters in search of nutrient-rich currents.

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Camera Tips

Capturing the Longhorned Pygmy Devil Ray requires an underwater camera setup, such as a waterproof action camera or a specialized marine trail cam. The most effective placement is near 'cleaning stations' on the edges of coral reefs. These are specific locations where rays go to have parasites removed by smaller fish. Mount your camera on a weighted tripod or secure it to a rocky outcrop at a depth of 5 to 10 meters, angling it slightly upward to capture the ray's silhouette against the surface light.

Because these rays are filter feeders, traditional baits like fish scraps will not work. Instead, focus on placement. Look for coastal 'bottlenecks' or channels where tidal currents are strong, as these areas naturally concentrate the plankton that the rays feed on. Setting your camera to a high frame rate (60fps or higher) is crucial; their movements are deceptive, and a high shutter speed will prevent motion blur during their fast glides or sudden turns.

Lighting is the biggest challenge for underwater captures. Schedule your camera to trigger during the middle of the day when the sun is highest in the sky to ensure maximum light penetration. If your camera supports it, use a 'blue water' color filter to bring out the natural contrast between the ray’s dark back and its white underside. Regularly clean the lens housing, as salt crystal buildup or algae can quickly ruin the clarity of your shots.

Similar Species

Species that look similar or are commonly confused with Longhorned Pygmy Devil Ray.

Shortfin Devil Ray

The Shortfin has much shorter cephalic fins and a slightly more pointed snout compared to the Longhorned variety.

Reef Manta Ray

Much larger in size with distinct dark and light patches on the shoulders that the Pygmy Devil Ray lacks.

Frequently Asked Questions

They are primarily diurnal, meaning they are active during the day. You are most likely to see them during the morning and late afternoon when tidal movements bring plankton closer to the shore.

Since they are marine animals, they can only be 'attracted' if your property faces a coastal bay or reef. They cannot be lured with food, but maintaining a healthy marine environment with minimal light pollution can encourage them to visit your local waters.

They are filter feeders that consume tiny organisms like zooplankton, krill, and small larval crustaceans by funnelling water into their mouths with their cephalic fins.

They are found in coastal suburban areas throughout the Indo-Pacific, particularly near docks and piers that extend into clear, tropical waters.

Size is the biggest giveaway; Pygmy Devil Rays are much smaller (under 5 feet) than Mantas (up to 23 feet). Additionally, Devil Rays have mouths located on the underside of their heads, whereas Mantas have mouths at the very front.

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