Solved A type of fish lay their eggs in freshwater streams.

Atlantic Salmon (Protected)

Do Catfish Lay Eggs?

What's Killing the Salmon in Our Urban Streams? A Mystery is Now Solved. - Earthjustice

Catalogue of Organisms: Knocked Off the Perch (Taxon of the Week: Percidae)

[Commentary] Tilapia: How an invasive fish came to dominate our ecology, food and psyche

Sunfish Care - Keeping Pumpkinseeds, Bluegills and Their Relatives

Freshwater Fish Pocket Guide - Department of Natural Resources

Silty Streams Muddy Freshwater Conservation Issues - Eos

Spawning Fish and Fish Eggs in the Aquarium - A Guide for Beginners

Breeding Freshwater Fish