Rasbora sarawakensis
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| Rasbora sarawakensis | |
|---|---|
.jpg) | |
| male | |
 | |
| female | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Danionidae |
| Subfamily: | Rasborinae |
| Genus: | Rasbora |
| Species: | R. sarawakensis |
| Binomial name | |
| Rasbora sarawakensis | |
Rasbora sarawakensis, also known as the blue line rasbora or Sarawak rasbora, is a species of ray-finned fish in the genus Rasbora which is endemic to the island of Borneo.
Rasbora sarawakensis males reach a maximum standard length of 4.5 cm.[2] It is a relatively stout bodied Rasbora with a large, pointed head. It has a golden ground colour with orange fins and blue longitudinal stripe.[3] The less colourful females are normally larger and more pot-bellied than the more highly coloured males.[4][5] These fish are usually found in schools of 7 to 12 or more.
Distribution
Rasbora sarawakensis is endemic to Borneo, occurring in both the Malaysian state of Sarawak and the Indonesia province of Kalimantan Barat. Within its range it has from many river systems including the Batang Kayan and Sungai Sarawak in Sarawak and the Mempawah and Melawi in Kalimantan Barat.[4]
Habitat
Rasbora sarawakensis occurs in rather sluggish flowing forest streams, with dense emergent vegetation, often lying within the shade of the rainforest canopy. The bed of these streams is normally made up of a thick layer of silt which is covered with fallen tree limbs and leaf litter, the water is usually relatively clear but has a pale brown color from the tannins released by the organic matter that has fallen into the stream as it decomposes.[4]