Complex sentence: Salmon are intensively produced in aquaculture in many parts of the worldsa salmon are anadromous: they are born in fresh water, migrate to the ocean, then return to fresh water to reproduce.
Split into simpler sentences: Salmon are intensively produced in aquaculture in many parts of the world. Typically, salmon are anadromous: they are born in fresh water, migrate to the ocean, then return to fresh water to reproduce.