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The Borneo shark (Carcharhinus borneensis) is a species of requiem shark, and part of the family Carcharhinidae. Extremely rare, it is known only from inshore waters around Mukah in northwestern Borneo , though it may once have been more widely distributed.
The Borneo river shark is known only from the Kinabatangan River in Borneo. It can reach a length of 78 cm (31 in). Only 13 specimens are known to science, all collected in 1996. Expeditions in 2010 and 2011 failed to find any, and while fishermen recognised the shark, they have not been seen for many years. [4]
The Borneo river shark is known only from the Kinabatangan River. [40] In 2010, the World Wide Fund for Nature (WWF) stated that 123 species have been discovered in Borneo since the "Heart of Borneo" agreement was signed in 2007. [41] Logging road in East Kalimantan, Indonesia. The WWF has classified the island into seven distinct ecoregions.
Their precise geographic range is uncertain, but the known species are documented in parts of South Asia, Southeast Asia, New Guinea [5] and Australia.Of the three currently described species, the Ganges shark is restricted to freshwater, while the northern river shark and the speartooth shark are found in coastal marine waters, as well.
Borneo shark: Carcharhinus borneensis (Bleeker, 1858) Critically endangered 0.7 m (2.3 ft) Copper shark: Carcharhinus brachyurus (Günther, 1870) Vulnerable 3.3 m (11 ft) Spinner shark: Carcharhinus brevipinna (J. P. Müller & Henle, 1839) Vulnerable 2 m (6.6 ft) maximum 3 m (9.8 ft) Nervous shark: Carcharhinus cautus (Whitley, 1945) Least concern
The broadfin shark (Lamiopsis temminckii) is a tropical whaler shark, characterized by the broad shape of its pectoral fins. [1] They are classified as requiem sharks of the family Carcharhinidae. This is one of two species in the genus Lamiopsis , the other being the Borneo broadfin shark ( Lamiopsis tephrodes ). [ 2 ]
Borneo has own a wide variety of bird species. The geological history of Borneo is a major factor: long isolation of the island, broken during the last Ice age, when Borneo was connected to the continent of Asia, led to a combination of Asian and native species. There are about 420 species of birds and 37 are endemic to Borneo [4] [5]
These physically diverse habitat provide different conditions for different organisms to live. Therefore, the biodiversity is increasing as the organisms have found their own favorite habitat to live. For example, orange utan exist only on the islands of Borneo and Sumatra because orange utan is dependence on forests for fruits and shelters.