uropod
uropod — 名詞
1. one of a pair of flat, wide body parts on the last section of the tail of a crus
尾肢
甲殼類尾部末端的附肢
one of a pair of flat, wide body parts on the last section of the tail of a crustacean (such as a shrimp, lobster, or crayfish). Together with the central tail piece (the telson), the uropods form a fan-like structure that helps the animal swim backward quickly and steer through the water.
To escape danger, a crayfish curls its tail and uses its uropods to swim backward.
為了逃離危險，淡水龍蝦會捲起尾巴並用尾肢向後游動。
uropods + tail curl for backward escape swimming
Marine biologists identify lobster species by the shape and color of their uropods.
海洋生物學家可以根據尾肢的形狀和顏色來區分不同品種的龍蝦。
shape and color of uropods for species identification
The shrimp's wide, flat uropods help push it through the water with each tail flick.
蝦子寬而扁平的尾肢有助於在每次甩尾時在水中推進。
After molting, a crab's new uropods are soft and take several days to harden.
螃蟹脫殼後，新的尾肢質地柔軟，需要好幾天才能硬化。
To flee predators, a prawn spreads its uropods like a fan and snaps its tail.
為了逃離捕食者，明蝦會像扇子一樣張開尾肢並合攏尾部。
文法句型
uropods (plural) + verb
用法筆記
Always found in pairs (left and right). Together with the telson at the centre, the uropods make up the tail fan, which is the main swimming organ of decapod crustaceans. The uropods of each pair are slightly different in shape — the outer one (exopod) is usually larger and divided into two parts, while the inner one (endopod) is smaller and simpler.