1) Arthropod genus 2) Genus ranatra 
Ranatra is a genus of generally slender predatory members of the family Nepidae, known as water scorpions or water stick-insects. Their front legs are strong and are used to grasp prey. They breathe through a pair of long breathing pipes extending from their tails. They eat tadpoles, small fish and other insects, which they pierce with their beak ...
[n] - elongate very slender water scorpions
genus Ranatra noun elongate very slender water scorpions