10 species aren't included.
Pictures of 1 Water Scorpion Specimen in the Genus Ranatra:
Ranatra Water Scorpion Adult
View 7 PicturesHere's a big water scorpion (no relation to actual scorpions). These guys are just about the most sinister-looking creatures you could find, and what's especially creepy is that they can come up out of the water and fly around, as I learned when one left my aquarium and buzzed my head while I was peeking into the microscope at a mayfly nymph.
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