降こう海かい型がた

noun

sea-run variety; anadromous type

Technical term in fisheries biology for fish that migrate from freshwater to the sea, such as certain salmonids. Contrasts with 陸封型 (landlocked type).

• サクラマスには降こう海かい型がたと陸りく封ふう型がたが存そん在ざいする。

  Cherry salmon have both a sea-run variety and a landlocked variety.

• 降こう海かい型がたの個こ体たいは海うみで大おおきく成せい長ちょうする。

  Individuals of the sea-run type grow large in the ocean.