caudal tracheal gill [动] 尾气管鳃
Rainbows also have a red or pink streak that runs from the gill cover to the caudal fin, inspiring their name.
虹鳟体侧有从腮盖到尾鳍的红色或粉红条带，正如它们的名字。
Bacterial secondary infections in the fish may generalize septicemias, and the fish show gill-rot, caudal rot, and ulcerative disease.
而患鱼继发感染细菌致病才是其死亡的主要原因。
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