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Diagnostic Description

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Belongs to the Betta coccina complex which is distinguished by having only 9 abdominal vertebrae (vs. 10-11 in all other Betta) and usually a deep red color. Within this complex, Betta persephone is distinguished by its blackish coloration. Betta rutilans shares with Betta tussyae, a modal dorsal ray count of 12 (vs. 10 and 11 in other species of the complex), a modal subdorsal scale count of 9 (vs. 7), a greater length of dorsal base (20-23% SL, vs. 14-19), absence of a midlateral blotch (vs. usually present in male Betta coccina and Betta sp. Witte & Schmidt, submitted) and white pelvic filament (vs. black in Betta coccina). Betta rutilans differs from Betta tussyae by a lower mode in dorsal (I, vs. II) and anal spines (II, vs. III), smaller size (up to 25 mm SL, vs. 48, aquarium specimens), and absence of bluish green spots on proximal areas of unpaired fins (vs. usually present). The single cleared and stained specimens is apparently distinguished from all other Betta by having fused hypurals 6 and 7 (Ref. 26721).
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Betta rutilans

provided by wikipedia EN

Betta rutilans is a species of gourami endemic to Indonesia. Their habitat is blackwater streams and peat swamp forests with very little sunlight.[2][3] Their name rutilans is Latin for "reddish", "grow red", or "being red".[4]

Description

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.[5] They will consume insects and small invertebrate.[4]

Reproduction

Like most Betta fish, they breed in bubble-nests built to house the fry. Strangely enough, some have been seen to mouthbrood. The cause of this difference is unknown.[5]

Captivity

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.[6]

References

  1. ^ Low, B.W. (2019). "Betta rutilans.". 2019: e.T91310650A91310657. doi:10.2305/IUCN.UK.2019-2.RLTS.T91310650A91310657.en. {{cite journal}}: Cite journal requires |journal= (help)
  2. ^ Froese, Rainer; Pauly, Daniel (eds.) (2014). "Betta rutilans" in FishBase. February 2014 version.
  3. ^ "Betta rutilans". Integrated Taxonomic Information System. Retrieved 15 Sep 2012.
  4. ^ a b "Betta rutilans". Seriously Fish. Retrieved 25 January 2014.
  5. ^ a b Kottelat, M., A.J. Whitten, S.N. Kartikasari and S. Wirjoatmodjo, 1993.
  6. ^ "Betta rutilans". Species Maintenance Program. Archived from the original on 12 August 2015. Retrieved 25 January 2014.
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Betta rutilans: Brief Summary

provided by wikipedia EN

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".

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