noun
nuptial coloration; breeding coloration
Biological term for the bright colors that fish, birds, and other animals develop during the breeding season.
サケは産卵期になると婚姻色が現れる。
Salmon develop nuptial coloration when the spawning season arrives.
婚姻色はオスに顕著に見られる
Nuptial coloration is often more pronounced in males.