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5     Letter from the Editor by Courtney Tobler
6     Aquatic Notebook
       • One or two Zebra Otocinclus?
by Stephan M. Tanner, Ph.D.
       • New freshwater fish species of 2023
by Michael Edmondstone, SHOAL

12     The Neon Tetra Group: Discovery, original description, and phylogenetic relationships
by Stanley H. Weitzman
24     The Cardinal Tetra of the Río Negro: A sustainable fishery for conservation
by Jackie Anderson, Scott Dowd, and Michi Tobler
38     Swimming with neons — Paracheirodon habitats
by Oliver Lucanus
46     The Neon Tetra — Paracheirodon innesi
by Hans-Georg Evers
52     Visiting neon tetra breeders in the Czech Republic
by Hans-Georg Evers
62     Husbandry and breeding — Steatocranus sp. ‘Dwarf’—captivating humphead cichlids
 by Anton Lamboj
68     Reportage: Ivanacara adoketa — the Zebra Acara
by Wolfgang Staeck
74     Reportage: A quartet of Lake Inle species 
by Dr. Paul V. Loiselle
82     Biotope Aquarium Contest 2023 — Organized by the BIOTOPE AQUARIUM Project
by Natasha Khardina

92     Aquarium Calendar
94     Retail Sources
97     Advertiser Index
98     Underwater Eye

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