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    Rio Negro

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    Pterophyllum altum, Río Ventuari,Río Orinoco basin – the population from the Río Ventuari, is the most similar to the Atabapo-form. ©BAP, photo Hans Mayland

    Definitive Guide to Pterophyllum – biology, habitat and distribution

    by Heiko Bleher  Updated information on known wild forms with described species and possibly 12…

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    • Articles
    Paracherodon simulans, Rio Negro, Brazil. ©BAP, photo N. Khardina

    Discovery of the 3rd Neon Tetra – Paracheirodon simulans

    By Heiko Bleher The discovery of neon number three, the blue neon tetra The third…

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    Paracherodon axelrodi in Nature, Brazil. ©BAP, photo H. Bleher

    Discovery of the 2nd Neon Tetra – Paracheirodon axelrodi

    By Heiko Bleher The discovery of neon number two, the cardinal tetra Just as the…

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    • Articles
    Natasha K., Ig.Sauvaudauà. ©BAP, photo J. Krivich

    Miniature fishes from blackwater Aracà

    By Heiko Bleher Location of collecting The Hemiodus was found in the estuary region of…

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    • Articles
    Rio Aracà, Rio Negro region. ©BAP, photo N. Khardina

    Exploring blackwaters of the Rio Aracà

    By Heiko Bleher Organising the trip I think there are many people around the world…

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  • About
    • About BAP
    • BAP Experts
    • Biotope Scientist
    • BAP for Universities and Research Institutions
    • BAP Scientific Participation Certificate
    • BAP Partners
    • Consulting
  • BAP Map
    • BIN – Biotopes In Nature
    • BAM – Biotope Aquarium Models
    • FISHES
    • PLANTS
    • INVERTEBRATES
    • ARTICLES
    • Glossary
  • BAC2026
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