water scorpion

noun

any of various long-legged aquatic insects of the heteropterous family Nepidae, which breathe by means of a long spinelike tube that projects from the rear of the body and penetrates the surface of the water

A water-scorpion which was put into a basin of water with several young tadpoles killed them all without attempting to eat one.

The Water Scorpion is a good representative of the Nepid, and has the distinguishing features of its tribe very strongly marked.

Even the water-scorpion moved slowly over a sunny place from the roots of an arrow-head lily to a dark corner under the duck-weed.

There was very little left now for any one; even the water-scorpion had disappeared.

This is a water-scorpion, and his way of catching his prey and getting his air supply will be interesting to watch.

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