Water scorpion
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The Ota Negative Bug, also known as the Ota Turtle, is also known as the Water Knocker, Pincer Bug, Turtle Bug, Water Bug, Water Buster, or Toe Biter. They often lurk quietly underwater and attach different camouflages to their bodies, waiting for prey to approach. Once in "range," they attack, biting and injecting their prey with a horrible digestive saliva, then feeding on the melted carcass.
Chinese name
Water scorpion
Alias
Odaiba turtle, water moccasin, pincerbugs, etc.