This is a species of hyperactive pond fish with a thirst for blood which lives mostly in the Ancient Wetland region of the Distant Planet. It's an excrutiatingly difficult enemy to deal with if you fight it underwater. The trick is to lure it onto land similarly to a Hermit Crawmad so you can finish it off before it flops back into the water. They tend to lie in wait by the water's edge, and they'll jump out when you walk by, snapping up some Pikmin as they flip back into the water. There are some instances where you'll just have to run past these things as you move through a secluded body of water. Ultra-Bitter Spray is very useful here!