A genus of giant water bugs, among the largest aquatic insects in the world, found in freshwater environments worldwide.
From Greek 'belone' (needle) and 'stoma' (mouth), referring to the sharp, needle-like rostrum or feeding tube characteristic of these predatory insects.
Giant water bugs can grow to 4 inches long and actually hunt small fish and tadpoles—one species can deliver a venomous bite so painful that people call it the 'toe-biter' bug.
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