Rhinobatos jimbaranensis

Rhinobatos jimbaranensis, commonly known as the Jimbaran shovelnose ray, is a critically endangered species of guitarfish endemic to Indonesian waters. This cartilaginous fish belongs to the family Rhinobatidae and is characterized by its flattened body shape that transitions from ray-like at the front to shark-like at the rear. The species was first scientifically described relatively recently and has a highly restricted distribution range, primarily found in shallow coastal waters around Bali and Java.

Like other guitarfish species, R. jimbaranensis inhabits sandy and muddy bottoms in nearshore marine environments where it feeds on small fish, crustaceans, and other benthic invertebrates. The species faces severe population declines due to intensive fishing pressure throughout its limited range.

Its shallow water habitat makes it particularly vulnerable to capture in artisanal and commercial fisheries, where it is often taken as bycatch in trawl nets and targeted for its fins, which are highly valued in international markets. The species' restricted geographic range compounds these threats, as local population declines cannot be offset by immigration from other areas. Conservation efforts for this species are limited, reflecting the broader challenges facing many Indonesian marine species.

The lack of specific management measures and continued fishing pressure in its core habitat areas contribute to its precarious conservation status. Research into the species' biology, population dynamics, and specific habitat requirements remains limited, hampering the development of targeted conservation strategies.

Rhinobatos jimbaranensis inhabits shallow coastal marine waters with sandy and muddy substrates around Bali and Java in Indonesia. The species is typically found in nearshore benthic environments where it forages for small fish, crustaceans, and other bottom-dwelling invertebrates.