Last Updated:2025/11/21
(ichthyology) A lateral ridge found just anterior to each side of the tail fin on the caudal peduncle of some types of fast-swimming fish. The keels improve the stability of the fish's attitude at speed in the water, and strengthen the support of the caudal fin.
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caudal keel
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Source Word
caudal keel
Noun
Japanese Meaning
尾柄部の尾びれ直前、魚の左右にある側方の隆起部。高速で泳ぐ魚の場合、この隆起が水中での姿勢の安定性を高め、尾びれの支持を強化する役割を果たす。
( plural )