Most of the coastal rivers in North America once teemed with great runs of anadromous fishes — organisms that hatch in inland freshwater streams, migrate to the salty sea, then return to the streams to spawn. (discovermagazine.com)
A spectacular example is the migrations between rivers and the sea by the so - called anadromous species such as salmon, shad, river herring and sturgeon. (dotearth.blogs.nytimes.com)
Fish that live in both fresh and salt water — and migrate to spawn - are called anadromous. (fieryfoodscentral.com)