Salmon are ______; they hatch in freshwater, migrate to saltwater, and return to freshwater to spawn.

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Multiple Choice

Salmon are ______; they hatch in freshwater, migrate to saltwater, and return to freshwater to spawn.

Explanation:
Anadromous describes a life cycle where fish are born in freshwater, spend much of their adult life in saltwater, and return to freshwater to spawn. Salmon follow this pattern exactly: they hatch in rivers, migrate to the ocean to grow, then swim back to freshwater to reproduce. Catadromous would describe species that are born in freshwater, migrate to saltwater to mature, and return to freshwater to spawn, which is the opposite of what salmon do. Microsporidian is a group of parasitic organisms, not a fish life-history pattern. Androgynous refers to individuals having both male and female reproductive organs, which isn’t about migration or spawning behavior. So, the correct term for salmon’s life cycle is anadromous.

Anadromous describes a life cycle where fish are born in freshwater, spend much of their adult life in saltwater, and return to freshwater to spawn. Salmon follow this pattern exactly: they hatch in rivers, migrate to the ocean to grow, then swim back to freshwater to reproduce.

Catadromous would describe species that are born in freshwater, migrate to saltwater to mature, and return to freshwater to spawn, which is the opposite of what salmon do. Microsporidian is a group of parasitic organisms, not a fish life-history pattern. Androgynous refers to individuals having both male and female reproductive organs, which isn’t about migration or spawning behavior.

So, the correct term for salmon’s life cycle is anadromous.

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