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  • Biotoecus opercularis
  • Biotoecus opercularis
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Scientific Name Biotoecus opercularis    (Steindachner, 1875)
Common Name
Type Locality Lago Saraca and Amazon at Villa Bella, Brazil.
Synonym(s) Saraca opercularis
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Size 100mm or 3.9" SL. Find near, nearer or same sized spp.
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Distribution South America: Amazon River basin, in the Branco River, the middle and lower Negro River, Urubu River, Lake Saracá, Parintins, Lake Carauaçu, lower Trombetas River.
Amazon, Middle Amazon (Solimoes), Negro, Lower Negro, Branco (Roraima) (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Negro, Lower Negro (click on these areas to find other species found there)
Amazon, Lower Amazon, Uatumã, Urubu (click on these areas to find other species found there)
Amazon, Lower Amazon, Trombetas, Lower Trombetas (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Negro, Middle Negro (click on these areas to find other species found there)
Lake Carauaçu (click on these areas to find other species found there)
Amazon, Lake Saracá (click on these areas to find other species found there)

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IUCN Red List Category
Least Concern
, range map and more is available on the IUCN species page. Last assessed 2018.
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Breeding Reports There is no breeding report.
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Reference Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 71 (1. Abth.), pp 125 [65]
Registered Keepers There is no registered keeper.
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There is but a single record of this fish being seen, view it.
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Biotoecus opercularis QR code LFS label creator
ARN ref:3.42.847.4928
Last Update 2025 Jan 01 12:45 (species record created: 2013 Jun 13 23:52)