Distribution and Habitat
One of the few members of its family that seems to exclusively inhabit fresh water, the white-edge freshwater whipray is known from four Southeast Asian river systems: the Kapuas River in Borneo, the Indragiri River in Sumatra, the Perak River in Peninsular Malaysia, and the Chao Phraya River in Thailand. Although these rivers are now isolated from one another, when sea levels were low during the Pleistocene epoch (2.6 million to 12,000 years ago) they may have all been contiguous as part of the Central or North Sundaland drainage basin. At that time, this ray could have dispersed into its present range without having to enter salt water. This bottom-dwelling species favors a sandy habitat.
Read more about this topic: White-edge Freshwater Whipray
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