Squatina legnota

Squatina legnota, commonly known as the smoothback angelshark, is a critically endangered species of angelshark found in the western Atlantic Ocean. This bottom-dwelling elasmobranch is characterized by its flattened body and broad pectoral fins that give it a ray-like appearance, though it remains taxonomically a shark. The species inhabits coastal waters along the continental shelf, typically found on sandy and muddy substrates where it can effectively camouflage while hunting for prey.

Historically distributed along the eastern coast of the United States, the smoothback angelshark has experienced severe population declines over recent decades. The primary threats to this species include commercial fishing activities, both as targeted catch and bycatch in bottom trawl fisheries. Habitat degradation from coastal development and pollution has further compromised available suitable environments.

The species' slow reproductive rate, with late sexual maturity and low fecundity, makes population recovery particularly challenging once numbers decline. Conservation efforts for Squatina legnota remain limited, though some protection may be afforded through broader marine conservation initiatives and fishing regulations in certain areas. Research into the species' current distribution and population status is ongoing but hampered by its rarity.

The smoothback angelshark's critical conservation status reflects the broader challenges facing angelshark species globally, many of which have experienced dramatic population reductions due to anthropogenic pressures on marine ecosystems.

Squatina legnota inhabits coastal waters of the western Atlantic, typically found on sandy and muddy substrates along the continental shelf. The species prefers bottom environments where its flattened body allows for effective camouflage while hunting prey.