Fish diurnal

Spinetail Devil Ray

Mobula mobular

The Spinetail Devil Ray is a breathtaking ocean acrobat, known for its massive wingspan and its habit of leaping high above the waves. Though rare and endangered, this gentle giant is a true crown jewel for any coastal wildlife watcher.

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Quick Identification

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Size

Disc width up to 5.2 meters (17 feet); weight up to 1,000 kg (2,200 lbs)

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Colors

Dark navy blue to black on the dorsal side; solid white or pale cream on the ventral (under) side

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Key Features

Distinctive 'horns' (cephalic fins) on the head
Pointed, wing-like pectoral fins
Long, whip-like tail with a small spine at the base
White underbelly with no dark spotting

When You’ll See Them

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Activity pattern diurnal

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Peak hours 10:00 AM - 4:00 PM

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Season June - September

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Diet A specialized filter feeder that consumes large quantities of krill, plankton, and tiny schooling fish by funneling them into its mouth using its cephalic fins.

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Habitat Deep coastal waters and open ocean; often found near continental shelves and deep-water canyons in the Mediterranean and Eastern Atlantic.

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Behavior

The Spinetail Devil Ray is one of the most majestic 'flyers' of the ocean. Unlike many other ray species that spend their time camouflaged on the sandy bottom, the Devil Ray is a pelagic species, meaning it spends its life swimming in the open water column. They are known for their incredible grace and social nature, often traveling in small schools. One of their most famous behaviors is breaching, where they launch themselves several feet out of the water, performing acrobatic flips before landing with a resounding splash.

While they may look intimidating due to their size and 'horns,' these rays are gentle filter feeders and pose no threat to humans. They are curious but generally shy around divers and boats. Unfortunately, they are highly sensitive to human activity and are currently listed as endangered, primarily due to being accidentally caught in industrial fishing nets.

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Camera Tips

Capturing a Spinetail Devil Ray on camera is a thrill that requires a specialized approach, typically involving an underwater housing or a pier-mounted setup. If you live on a coastal property with access to deep water or a long dock, mount your AI-powered camera in a waterproof housing approximately 3 to 6 feet below the surface. Point the lens slightly upward to take advantage of the natural sunlight filtering down; this 'backlighting' effect makes it much easier for AI software to recognize the ray's distinct diamond-shaped silhouette against the bright surface.

Unlike backyard birds, you cannot use traditional bait to attract these rays, as they only eat live, microscopic plankton. However, you can 'bait' the area with light. During night-time or twilight observations, a strong green or blue underwater LED light can attract clouds of plankton, which in turn may draw a Spinetail Devil Ray into your camera's field of view for a midnight snack. Ensure your camera is set to a high frame rate (at least 60fps) because, despite their size, these rays can glide through the frame surprisingly fast.

For the best results, place your camera near natural bottlenecks like the end of a jetty or a narrow channel where tidal currents are strong. These currents naturally concentrate the plankton that the rays feed on. If you are using a trail camera from a high vantage point (like a balcony or cliffside), use a circular polarizing filter on the lens to cut through the water's surface glare, allowing the camera to 'see' the dark shapes of the rays moving beneath the waves.

Similar Species

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

Giant Oceanic Manta Ray

Much larger than the devil ray, Mantas lack the tail spine and have mouths at the very front of their body rather than underneath.

Lesser Devil Ray

Smaller in size (usually under 4 feet) and lacks the long, whip-like tail of the Spinetail.

Frequently Asked Questions

Spinetail Devil Rays are primarily diurnal, meaning they are most active during daylight hours. They are often seen basking or feeding near the surface when the sun is highest, which is also the best time for photography.

Since they live in the ocean, you can only 'attract' them if you have a waterfront property. You cannot use food, but installing underwater lights at night can attract the plankton they eat, potentially bringing them closer to your dock or seawall.

They are filter feeders. They use the 'horns' on their head to channel water into their mouths, where they filter out krill, small shrimp-like crustaceans, and very small fish.

No, they are strictly marine animals. They are only found in coastal suburban areas with deep-water access, particularly in the Mediterranean region and parts of the Atlantic ocean.

Spinetail Devil Rays have a visible spine at the base of their tail (which Mantas lack), and their mouths are located on the underside of their head, whereas Manta Ray mouths are right at the very front.

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