The Killer Mantis, also known as the Mantis, is an enemy from Final Fantasy II. It uses its sharp mandibles for high-powered physical attacks. It is highly advised to defeat them ASAP to prevent the party from facing such attacks. Though it's likely that, by the time the player encounters these creatures, they have leveled up to the point where these enemies are not a big threat. Ice-type attacks work best.
Mantises is an order of insects that contains over 2,400 species and about 430 genera in 15 families worldwide in temperate and tropical habitats. Most are in the family Mantidae. A common name, often applied to any species in the order, is "praying mantis" due to the typical "prayer-like" posture with folded fore-limbs, although the eggcorn "preying mantis" is sometimes used in reference to their predatory habits. In Europe and other regions, however, the name "praying mantis" refers to only a single species, Mantis religiosa.