9 Cool Freshwater Fish You've Never Heard Of - Cool Green Science

Do you know the hardhead? The chiselmouth? The bigmouth buffalo? Celebrate freshwater biodiversity with these cool fish.

10 Best Cold Water Fish That Don't Need an Aquarium Heater – Aquarium Co-Op

30 Cool & Colorful Freshwater Aquarium Fish (With Photos)

A Quarter of Freshwater Fish Are at Risk of Extinction, a New Assessment Finds - The New York Times

The fight to save one of the world's oldest fish species, Environment

9 Cool Freshwater Fish You've Never Heard Of - Cool Green Science

Northern pike - Wikipedia

Come See Me/ Not The Only One EP, The Chisel, chiseled me

Inside the International Effort to Save One Tiny Mexican Fish

Come See Me/ Not The Only One EP, The Chisel, chiseled me

Tiny fish spotted in a single stream could go extinct just after being found

I want a striking, unusual single fish to keep in a 20 gallon freshwater tank. Just one fish. Ideas? - Quora

Behavioral Changes and Problems in Aquarium Fish

Come See Me/ Not The Only One EP, The Chisel, chiseled me

23 Predatory & Aggressive Freshwater Fish For Your Tank

In search of the world's largest freshwater fish: Wonderfully weird giants lurking in Earth's rivers