Fivefinger Razorfish

Iniistius pentadactylus

The Fivefinger Razorfish, also known as Iniistius pentadactylus, is a marine fish found across the Indo-Pacific region, stretching from the eastern coast of Africa to the Pacific islands. This species is characterized by its pale-grey body adorned with several overlapping red spots along the lateral line, which appear black underwater. Males have a distinctive brown blotch near the pectoral fin, while females display a large white area with red scale margins on their lower flanks. The fish's body is notably compressed with a steep, knife-like forehead, aiding in its ability to dive into sand when threatened. This razorfish inhabits sandy substrates in coastal areas, often in regions with seagrass or algae. It is typically found at depths ranging from 2 to 30 meters. The species is known to form large, dispersed groups on the upper slopes of sand and mud banks. Males are territorial, each defending a territory that includes multiple females. At night, or when alarmed, the Fivefinger Razorfish buries itself in the sand for protection. Its diet mainly consists of hard-shelled invertebrates, such as mollusks and crustaceans. Divers encountering this species may observe its unique behavior of diving head-first into the sand, a defensive mechanism that can delay its re-emergence. The Fivefinger Razorfish is currently listed as 'Least Concern' on the IUCN Red List.