https://freshwaterhabitats.org.uk/species/freshwater-fish/
Freshwater fish - Species Directory - Freshwater Habitats Trust
Oct 4, 2023 - There are approximately 42 native species of freshwater fish in the UK. Many marine species venture into mainland waters to breed.
freshwater fish speciesdirectoryhabitatstrust
https://species.wikimedia.org/wiki/Main_Page
Wikispecies, free species directory
wikispeciesfreedirectory