Borneo Broadfin Shark

The Borneo broadfin shark is a medium-sized shark reaching a maximum total length of 157 cm. Males mature at around 114 cm total length and females at 130 cm total length. Reproduction is placental viviparous, with litters typically comprising 4–8 pups (usually 8). Gestation lasts around eight months, and pups are born at 40–60 cm total length. The generation length is suspected to be approximately 6.5 years, based on similarity to the daggernose shark (Isogomphodon oxyrhynchus).

The Borneo broadfin shark occurs in the Western Central and Northwest Pacific. It is reported from Thailand, Indonesia, Malaysia, and is considered to occur more widely through the Indo-Malay Archipelago to southern China, with its overall range including Cambodia, China, Indonesia, Malaysia, Thailand, and Vietnam. This species is associated with inshore habitats on the continental shelf, linked to turbid estuarine waters and presumably in depths of less than 50 m. It occurs in estuaries and over subtidal sandy, sandy–muddy, and muddy substrates.

The Borneo broadfin shark is a marine neritic species that occurs in estuarine and shallow coastal habitats. It inhabits turbid waters of the continental shelf, including estuaries and subtidal sandy, sandy–muddy, and muddy habitats, generally at depths shallower than 50 m. The species is placental viviparous, with litters typically consisting of 4–8 pups (usually 8) and a gestation period of around eight months. Size at birth is 40–60 cm total length. The generation length is suspected to be around 6.5 years.