刀鱼，学名长颌鲚（Coilia ectenes Jordan），又称刀鲚，毛鲚，是一种洄游鱼类，与河鲀、鲥鱼并称为中国长江三鲜之一。
为了能有空间装入相机和其他电子设备，梅吉尔的团队开始关注刀鱼，这种鱼可以让身体保持僵硬，来感知水中的电流。
To allow more room for cameras and other electronics, Megill's team took cues from the knifefish, which keeps its body rigid to sense electric currents in the water.
有这样一个机器人，它的样子和游泳动作都很像一条鱼——这就是巴斯大学的Gymnobot。它的样子是模仿亚马逊流域的一种刀鱼。
If it looks like a fish and swims like a fish, it could be a robot — such as the University of Bath's Gymnobot (pictured), inspired by an Amazonian knifefish.
特产“长江三鲜”（长江鲥鱼、刀鱼、河豚），是江南著名的“鱼米之乡”。
The most famous local specialty of Jiangyin is "Three Yangtze Delicacies" (Yangtze hilsa herring, saury, and balloon fish).
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