More slug-looking than anything, this little guy is giving off a message to his predators that he will not make a tasty meal.
这只长得像鼻涕虫的小家伙正在向他的捕食者发出一个信息：他不会是美味的食物。
They didn't look anything like the photo below, although they were very tasty.
他们看起来一点也不像下面图片里的样子，尽管都非常好吃。
The reflections of the clicks they generate tell them whether anything nearby might make a tasty meal.
它们所发出的短促叫声的回波告诉它们是否附近有可享用的美味肉食。
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