Atlantic Saury

The Atlantic Saury (Scomberesox saurus), sometimes called the Skipper, is a slender pelagic fish in the family Scomberesocidae, closely related to needlefish and halfbeaks within the order Beloniformes. It inhabits open surface waters of the temperate North Atlantic, ranging widely across both sides of the ocean basin, with related subspecies also found in the Southern Hemisphere. The species has short, pointed, beak-like jaws rather than the greatly elongated jaws of true needlefish, and a distinctive row of small finlets between the dorsal and anal fins and the tail, a trait shared with mackerel-like fishes. Atlantic Saury travel in large surface schools and are an important prey species for tuna, seabirds, and other open-ocean predators.

• Long, slender, cylindrical body, typically 30-50 cm as an adult
• Short, pointed, beak-like jaws, much shorter than the elongated jaws of true needlefish
• A row of small finlets located behind the dorsal and anal fins, leading to the tail, similar to those on mackerel
• Dark blue-green iridescent back fading to silvery sides and belly
• Deeply forked tail fin used for rapid bursts near the surface
• Distinguished from needlefish by its short beak and finlets; distinguished from the Pacific Saury mainly by its North Atlantic range and slightly larger typical size

Atlantic Saury are a pelagic, open-ocean species found at the surface of temperate waters across the North Atlantic, from North American to European coasts. They generally remain well offshore over deep water rather than close to shore, forming large surface schools that follow seasonal temperature and productivity patterns. The species favors cooler temperate seas compared with many other Beloniformes, and its range extends into the eastern Atlantic and Mediterranean margins as well as the western Atlantic. Related subspecies occupy analogous temperate surface habitats in the Southern Hemisphere, reflecting a broadly antitropical distribution pattern typical of some cool-water pelagic fish.

Atlantic Saury travel in large, fast-moving surface schools, often skimming or skipping across the water when startled, a behavior that gives rise to the alternate name "Skipper." They feed on planktonic crustaceans and other small surface organisms, filtering through the upper water column as they move. Schools are heavily preyed upon by tuna, billfish, seabirds, and marine mammals, making the species an important mid-level link in North Atlantic pelagic food webs. Atlantic Saury undertake seasonal migrations tied to temperature and food availability, and spawning occurs in open water, with eggs bearing filaments that attach to floating debris or vegetation, a reproductive pattern typical of the wider needlefish and flyingfish order.