Atlantic Angel Shark (Sand Devil)

• Maximum length1.52 m (5 ft); most adults 0.9–1.2 m
• WeightUp to about 16 kg (35 lb)
• LifespanUnknown; no validated age study
• Depth rangeShoreline to about 1,290 m (4,230 ft); mostly 40–250 m
• DietBottom fish (croakers, goatfish, butterfish), squid, crabs
• IUCN statusLeast Concern (assessed 2017)

How to recognise an Atlantic angel shark

At first sight this is a ray, not a shark: a flat, broad body, wing-shaped pectoral fins and eyes on top of the head. Look closer and the shark characters show: five gill slits on the sides of the head, not underneath; pectoral fins separate from the head, with a clear notch between the two; and a mouth at the very tip of the snout. Two short barbels hang from the nostrils, with smooth or faintly fringed edges, and a big spiracle opens just behind each eye.

The tail is thick and shark-like, with two small equal dorsal fins set far back, no anal fin, and a caudal fin whose lower lobe is longer than the upper, the reverse of almost every other shark. The back is ash grey to bluish grey, often with a reddish wash and a scatter of small dark spots; the belly is white. A row of small thorns runs down the midline of the back, strongest in juveniles, and clusters of enlarged denticles sit between the eyes and spiracles. The teeth are conical, smooth-edged and broad-based, roughly ten on each side of the upper jaw and nine below, built to spear rather than slice.

Within its range it is the only angel shark north of the Caribbean, so identification there is about telling it from skates and rays (our guide to sharks versus rays covers the characters). In the southern Caribbean it overlaps with smaller, recently described Squatina species.

How big do Atlantic angel sharks get?

The Atlantic angel shark is a mid-sized member of its family. The largest reliably measured specimens are about 1.52 m (5 ft) long and weigh around 16 kg (35 lb); most adults trawled up off the Carolinas or in the northern Gulf of Mexico are 0.9–1.2 m (3–4 ft) and weigh far less. The species is therefore smaller than the European angelshark, which passes 1.8 m, and about the size of the Pacific angelshark of California.

Pups are 25–30 cm (10–12 in) at birth, miniature copies of the adults with the dorsal thorns already visible. Males mature at about 92 cm (36 in) and females at about 86–89 cm (34–35 in), an unusual case of males maturing at the larger size, although the biggest individuals in any sample are still female. How many years that takes is not established: vertebral growth bands have been counted but never validated, so there is no accepted age at maturity or lifespan for the species. The size bar below sets the 1.52 m maximum against a 1.8 m diver.

Where Atlantic angel sharks live

The sand devil is a western Atlantic species. Its core range runs along the United States seaboard from southern New England (Massachusetts, and occasionally the Gulf of Maine) past New York, the mid-Atlantic states and North Carolina to Florida, then around into the northern and eastern Gulf of Mexico, where it is common on the shelf off Louisiana, Alabama and the Florida panhandle. Records continue through the Caribbean, off Cuba, Jamaica and Nicaragua, to Venezuela and Colombia, though some southern records may belong to angel sharks described from the region more recently.

Its habitat is soft bottom: sand, shell hash and mud on the shelf and upper slope, where it buries itself with a few flicks of the pectoral fins. In the northern Gulf and off the Carolinas the sharks are caught from about 40 to 250 m, and in the north they move with the seasons, sitting in 30–40 m on the shelf in summer and shifting out beyond 90 m from autumn to spring as the inshore water cools. Off the southern Caribbean the species has been taken as deep as 1,290 m (4,230 ft), one of the deepest records for any angel shark. Water temperature across that range runs from about 8 °C on the deep slope to the mid-20s on the summer shelf.

What Atlantic angel sharks eat and how they hunt

Everything about the sand devil is built around one manoeuvre. It settles onto the bottom, flicks sand over its back until only the eyes and spiracles show, and waits. When a fish swims within range the shark drives its head upward, the jaws shoot forward on their hinges and the mouth opens wide in a fraction of a second, and the prey is pulled in on the inrush of water and pinned by the conical teeth. High-speed video of angel sharks puts the whole strike at about a tenth of a second, and a shark may hold its ambush site for days.

The best data come from the northern Gulf of Mexico, where hundreds of stomachs have been examined. Bony fish dominate: Atlantic croaker, spot, longspine porgy, Gulf butterfish, dwarf and red goatfish, flatfish and other bottom species that cruise just above the sand. Longfin inshore squid are the next most important item and matter most to smaller sharks; crabs, shrimp, skates and bivalves appear occasionally. The sharks appear to pick prey about half the width of the gape, worth the lunge yet small enough to swallow whole, and the menu shifts with season as fish move on and off the shelf.

Angel sharks find prey in poor light with the lateral line and the electroreceptors on the snout as much as with the eyes, which is how a buried shark can strike a fish passing overhead in the dark.

Behaviour and adaptations for life under the sand

A sand devil spends most of its life motionless, and the challenge of that is breathing. A shark buried in sand would clog its gills by drawing water through the mouth, so angel sharks take water in through the large spiracles on top of the head and push it out through the gill slits with the muscular gill flaps, keeping the mouth shut and the sediment undisturbed; the details are on our page on how sharks breathe. The dorsal thorns and the spotted, sand-coloured skin complete the disguise.

Otherwise the species is solitary: individuals are caught alone, and there is no evidence of aggregations beyond loose concentrations where prey is dense. Movement is seasonal rather than migratory in the long-distance sense: an inshore-offshore shuffle along the shelf that keeps the sharks in a preferred temperature band, with tagging in the mid-Atlantic showing individuals returning to the same summer grounds. Swimming, when it happens, is a slow undulation of the tail with the pectoral fins held out like wings, low over the bottom.

Hauled onto a deck the sand devil is a different animal. It thrashes, twists its head back over its own body and snaps at whatever is nearest, and that reflex, not any interest in people, is the whole basis of its reputation.

Reproduction and lifespan

Atlantic angel sharks bear live young by yolk-sac viviparity: the fertilised eggs are held in thin capsules inside the uterus, hatch there, and the embryos grow on their yolk with no placenta and no egg-eating. A female has two working uteri but, like most angel sharks, only one functional ovary. Mating takes place in spring, the male gripping the female's back to hold position, and gestation lasts roughly 12 months, so the pups of one year's mating are born the following February to June. Births in the northern Gulf of Mexico take place in about 20–30 m of water on the inner shelf, where the young stay through their first summer.

Litters are large for a shark of this size: 4–25 pups, with a dozen or so typical, each 25–30 cm long. Because a female needs a year to rebuild her ovary and yolk reserves after a year of pregnancy, she produces a litter only every second year at best. Maturity comes at 92 cm in males and 86–89 cm in females. The age those lengths represent, and the lifespan beyond them, have never been validated; the related Pacific angelshark is thought to live 25–35 years, so a similar span is plausible (see how long sharks live for why such estimates are often wrong).

Are Atlantic angel sharks dangerous to people?

Only to hands and feet, and only when provoked. The sand devil lives mostly below diving depth and has no interest in anything larger than a butterfish. The SharkSider database records angel shark bites only under the family name, never as Squatina dumeril, so no incident is attributed to this species; of the generic "angel shark" entries, two fall inside its range, a wader bitten on the ankle at Hilton Head Island, South Carolina, in July 2006 and a fisherman on Georges Bank in 1910, and both were minor. The Canary Islands cases in the same file, several waders bitten on the feet, involve the European angelshark, a different species on a different continent.

What those cases share is contact. An angel shark buried in shallow sand does not move away from a foot coming down on it; it strikes upward, which is exactly what it does to a fish. On boats the danger is the same reflex: a sand devil on a line will bend its head back and bite the hand that reaches for the hook, and the conical teeth leave deep punctures. Unhook one with a tool or cut the leader, and never grab the tail of one on the sand. For the sharks along the same coasts that bite unprovoked, see the South Carolina attack record and our advice on what to do in a shark encounter.

The SharkSider database has no incident attributed to this species. The database draws on the International Shark Attack File, the Global Shark Attack File and verified local reports, and is updated weekly.

Conservation status

The IUCN Red List assesses the Atlantic angel shark as Least Concern, an upgrade from the Data Deficient listing it carried for years, on the grounds that trawl surveys along the US coast and in the Gulf of Mexico show a stable or increasing population and that the species is not targeted by any fishery. That makes it the exception in a family in crisis: the European angelshark is Critically Endangered, and most Squatina species are threatened by bottom trawling, which a flat, sand-dwelling shark cannot avoid.

The sand devil is caught the same way, as bycatch in shrimp trawls in the Gulf and the South Atlantic Bight and in bottom trawls off the mid-Atlantic states, but its wide range and deep-water refuge appear to buffer it. In United States federal waters it is on the prohibited species list under the Atlantic highly migratory species regulations, so neither commercial nor recreational fishers may keep one, and any caught must be released. The meat is edible and was once sold, sometimes as monkfish, but there is no market of consequence today. The species has no listing under CITES or the Convention on Migratory Species.

Threats worth watching are trawl mortality in the Caribbean, where release is not required, and the hypoxic "dead zone" that spreads across the Louisiana shelf each summer; neither has yet shown up in the survey numbers. Our page on why sharks are endangered explains why the rest of the family fares so much worse.

Similar species and close relatives

All angel sharks look alike, and the twenty-odd species of Squatina are told apart by details of the barbels, the thorns, the spacing of the eyes and spiracles and the shape of the pectoral tips. The sand devil's closest neighbours are the small angel sharks of the Caribbean and Brazil, among them the Argentine angelshark and the angular angelshark of the South American shelf, both heavily trawled and both threatened. Across the ocean the European angelshark of the eastern Atlantic and the sawback angelshark of the Mediterranean and West Africa share its body plan; the sawback carries a much stronger row of dorsal thorns. On the Pacific side the Pacific angelshark fills the same role from California to Mexico and is the best-studied species in the family. The African angelshark and the Japanese angelshark round out the group's spread across the world's temperate and tropical shelves.

Unrelated look-alikes are the skates and rays that share the sand. The quickest check is the gill slits, on the side in an angel shark and underneath in a ray, and the pectoral fins, which are free of the head in the shark and fused to it in the ray. The wobbegongs of Australia reached the same flattened ambush shape from a different branch of the shark family tree.

• Pacific Angelsharkspecies profile
• Sawback Angelsharkspecies profile
• Angular Angelsharkspecies profile
• Argentine Angelsharkspecies profile
• African Angelsharkspecies profile
• Japanese Angelsharkspecies profile

Written and reviewed by

SharkSider Editorial Team

A small team focused on researching sharks and making marine biology easy to understand. Every page is reviewed against current species records and the SharkSider attack database, and updated when new incidents or research appear.

Published August 23, 2022 · Last updated September 22, 2026 · No incident attributed to this species in the SharkSider attack database, which is updated weekly.