Brown Guitarfish

Species Overview

The brown guitarfish is a bottom-dwelling elasmobranch characterized by a flattened, guitar-shaped body that blends features of sharks and rays. Its broad, triangular pectoral fins fuse with the head to form a disc-like shape, tapering into a muscular, shark-like tail. Typically found resting on or partially buried in sandy or muddy substrates, this species feeds on small invertebrates and fish, using electroreception to locate prey hidden in sediment.

As a mid-level predator, it plays a role in regulating benthic invertebrate populations and serves as a prey source for larger predators.

Range and Habitat

The brown guitarfish inhabits coastal and shelf waters across a wide geographic range, including Japan, Taiwan, China, South Korea, Australia, Indonesia, the Philippines, India, Sri Lanka, Madagascar, Mozambique, Oman, the UAE, Mexico, Suriname, and Micronesia. It is strictly marine, favoring shallow, soft-bottomed coastal environments, including nursery areas important for juvenile development.

Threats

This species faces intense pressure from bottom trawling and commercial fishing, both as a target catch and as bycatch. Coastal aquaculture expansion and habitat degradation—compounded by logging-related runoff and marine pollution—have degraded critical nursery grounds. Overfishing of prey species further strains its food supply, while its slow reproductive rate limits population recovery under sustained fishing pressure.

Conservation Status and Outlook

Conservation measures remain limited relative to the scale of threats, with some countries implementing general fisheries management and bycatch reduction measures rather than species-specific protections. The population is currently classified as Critically Endangered with a decreasing trend. Given ongoing habitat loss and fishing pressure across its range, the species' trajectory remains concerning without stronger, coordinated management interventions.

This guitarfish inhabits shallow coastal waters, sandy and muddy bottoms of continental shelves, and estuarine environments in the Northwest Pacific. It typically occurs in depths ranging from nearshore waters to approximately 200 meters, preferring soft substrates where it can bury itself for camouflage and foraging.