Squatina occulta

Squatina occulta, commonly known as the hidden angelshark, is a critically endangered species of angelshark found in the western Mediterranean Sea. This bottom-dwelling elasmobranch is characterized by its flattened body and broad pectoral fins that give it a ray-like appearance, allowing it to camouflage effectively on sandy and muddy substrates. The species inhabits continental shelf waters at depths ranging from shallow coastal areas to several hundred meters deep.

Like other angelsharks, S. occulta is an ambush predator that buries itself in sediment and feeds primarily on small bony fish, crustaceans, and mollusks. The hidden angelshark has experienced severe population declines throughout its range, leading to its classification as Critically Endangered by the IUCN.

The species faces multiple anthropogenic threats that have contributed to its precarious conservation status. Historically more widespread in the Mediterranean, current populations are believed to be highly fragmented and reduced to small remnant groups. The species' slow reproductive rate, with late sexual maturity and low fecundity typical of elasmobranchs, makes population recovery particularly challenging.

Conservation efforts for S. occulta include habitat protection measures, fishing regulations, and monitoring programs aimed at tracking remaining populations. Research initiatives focus on better understanding the species' ecology, distribution, and population status to inform targeted conservation strategies.

International cooperation among Mediterranean countries is essential for the species' conservation given its transboundary distribution.

Squatina occulta inhabits sandy and muddy bottoms of the continental shelf in the western Mediterranean Sea, typically at depths ranging from shallow coastal waters to several hundred meters. The species requires soft sediment substrates where it can bury itself for camouflage and ambush hunting.