All FishesBagridaeBatasio

  • Batasio spilurus
  • Batasio spilurus
Hop to next section All Fishes Data Sheet
Scientific NameBatasio spilurus  Ng, 2006
Common Name
Type LocalityIndia: Assam, Dibrugarh district
Pronunciationbah tah see oh - spy lure us
EtymologyThe genus name comes from the local (Bengali) name of the fish (batasio or batashi). From the Greek spilos, meaning spot, and ouros, meaning tail, in reference to the distinct spot at the base of the caudal peduncle.
Hop to next section Species Information
Size 55mm or 2.2" SL. Find near, nearer or same sized spp.
IdentificationThe bagrid genus Batasio Blyth comprises of small, laterally compressed catfishes distributed in South and Southeast Asia, diagnosed from its confamilials in having large sensory pores on the head, a narrow mental region, a pair of posteriorly-directed processes on the anterior part of vomer, a transversely-elongated bar-like entopterygoid, and the metapterygoid in close contact with the quadrate but free from the hyomandibular (Mo, 1991).

Batasio spilurus n. sp. can be distinguished from all congeners in having a short adipose-fin base (12.6–12.8 vs 14.5–33.3% LS) and more slender caudal peduncle (5.7–6.2 vs 6.7–11.8% LS). It further differs from all congeners except B. pakistanicus and B. tengana in having a slender body (12.6–13.6 vs 15.8–23.9% LS). It can be further distinguished from B. pakistanicus in the pectoral fin rays not reaching (v. reaching) the pelvic-fin origin, and from B. tengana in having a wider head (16.4–16.5 vs 12. 5–14.5% LH), the presence of a distinct black triangular spot at the base of the caudal peduncle (vs spot very diffuse or absent), and a sharper snout when viewed laterally.
SexingNot known.
Hop to next section Habitat Information
DistributionKnown from the Brahmaputra River drainage in the vicinity of Dibrugarh and in the Siang River in Arunachal Pradesh.
Indian waters, North Eastern India Waters, Padma, Jamuna, Brahmaputra (click on these areas to find other species found there)
Indian waters, North Eastern India Waters, Padma, Jamuna, Brahmaputra, Siang (click on these areas to find other species found there)
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IUCN Red List StatusData Deficient
Temperature20.0-25.0°C or 68-77°F (Show species within this range)
Other ParametersThe water should be cool and heavily oxygenated with a good flow as these fish occur in hill streams.Anything above 25 C will hamper long term survival as these fish tend to burn away at higher temperatures.
Hop to next section Husbandry Information
FeedingIs known to take processed food but prefers live food like blood worms, frozen brine shrimp etc. Needs sometime to gradually get weaned off live foods. Spot feeding will help in case tank mates are voracious feeders.
FurnitureFine sand for the bottom and smooth pebbles / rocks. Cover / hiding spots can be created with either plants or wood.
CompatibilityA peaceful species suitable for a hillstream biotope.
Suggested TankmatesPeaceful Cyprinids like Puntius or Oreichthys and Balitorine loaches like Schistura or Nemacheilus species.
Hop to next section Further Information
ReferencesThe identity of Batasio tengana (Hamilton, 1822), with the description of two new species of Batasio from north-eastern India (Teleostei: Bagridae) H. H. Ng.
Darshan et al. (2017). J. Fisheries Sci., 11(2): 21-27.
Registered KeepersNone.
Breeding ReportsNone.
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Last Update2018 Jan 01 11:44 (species record created: 2011 Sep 23 08:40)