Betta rutilans is a species of gourami endemic to Indonesia. Their habitat is blackwater streams and peat swamp forests with very little sunlight. Their name rutilans is Latin for "reddish", "grow red", or "being red".
They typically grow up to 3.5 centimetres (1.4 in) TL in length. Like their name implies, they are typically solid red with males of the species being more intensely colored, but a few rarely have green side. Males have more-so pointed dorsal fins and longer pelvic fins. Females are generally rounder and have an egg tube. They will consume insects and small invertebrate.
This species has been collected for use in aquariums for their intense color. They can be housed in community tanks with proper hiding spots in place and tank adequately sized for the amount of fish and species. They are from blackwater environments and should be housed in warm water with filtering.
- Froese, Rainer and Pauly, Daniel, eds. (2014). "Betta rutilans" in FishBase. February 2014 version.
- "Betta rutilans". Integrated Taxonomic Information System. Retrieved 15 Sep 2012.
- "Betta rutilans". Seriously Fish. Retrieved 25 January 2014.
- Kottelat, M., A.J. Whitten, S.N. Kartikasari and S. Wirjoatmodjo, 1993.
- "Betta rutilans". Species Maintenance Program. Archived from the original on 12 August 2015. Retrieved 25 January 2014.
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