Which of the following fish spawn in spring?

Rainbow trout are known to spawn in spring, typically when water temperatures begin to rise, usually around April to June, depending on the regional climate. During this period, they seek out clean, gravelly areas in streams and rivers to lay their eggs. The timing of their spawning is influenced by water temperature and flow, which signal to the fish that conditions are favorable for reproduction.

Brown trout also spawn in the fall, usually between September and November, while Pacific salmon typically spawn in the fall as well, often returning to their natal streams to complete their life cycle after migrating from the ocean. Catfish are more variable in their spawning habits but generally do so in warmer summer months, laying their eggs in nests they create in shallow waters. This understanding of each species' reproduction cycle highlights why rainbow trout are the correct answer regarding spring spawning.