Endangered
Borneo broadfin shark
Lamiopsis tephrodes
Borneo broadfin shark is a shark or ray in the family Carcharhinidae (order Carcharhiniformes) — Lamiopsis tephrodes, recorded as Endangered.
The shark or ray
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.
Range and habitat
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 among them 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.
Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.
Breeding
Sharks and rays grow slowly and have few young. A fishery that treats them as bycatch can empty a coastal form.
In crisis
The species has been assessed as Endangered under criteria A2d on the IUCN Red List due to suspected population reductions driven by intensive fishing pressure across its range. The current population trend of the Borneo broadfin shark is considered decreasing. Reconstructed catches and landings data for sharks, rays, skates, and carcharhinid sharks in parts of the species’ range indicate substantial declines that are used to infer population reduction for this species.
In Vietnam, reconstructed catches of sharks, rays, and skates in the Exclusive Economic Zone (EEZ) declined by 97% between 1986 and 2014, despite increasing fishing effort, suggesting strong reductions in populations of these groups. In Indonesia, reconstructed carcharhinid catches increased markedly through the mid–late twentieth century before collapsing in some regions and declining in others, even as effort remained high or increased.
Borneo broadfin shark is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.
Sources
Written for this catalog from the English Wikipedia article on Borneo broadfin shark, Wikidata item Q246905. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.
