Fish lists
Fish by water and size
Lists built from the atlas's own data: the cited chemistry of each fish's home water, and the temperature and size recorded on each species page. Nothing on them is hand-picked, so they grow as waters are measured and species are added.
- Soft-water fish1,000 speciesFish whose home water is measured as soft in the cited limnology of that river or lake, from the blackwaters of the Rio Negro to the Congo basin.
- Hard and alkaline water fish1,411 speciesFish of hard water and of alkaline, buffered water, grouped by the lake or river they come from and its cited chemistry.
- Blackwater fish332 speciesBlackwater rivers run tea-coloured with dissolved organic matter and are very soft and acidic. These are the atlas fish whose habitat water is a blackwater river with cited chemistry.
- Coldwater fish574 speciesFish whose recorded temperature range stays below typical tropical-tank settings.
- Nano fish1,372 speciesThe atlas's smallest fish: species whose recorded maximum length is 4 cm or less.
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