Water Tiger (Predatory Diving Beetle Larvae)
These aquatic predators may only measure a couple of inches at most, but make up for their size in other ways. Their hollow main pincers can inject prey with digestive fluids that quite literally liquify the internals while the water tiger remains attached to its prey, before it then uses the same pincers to suck out the liquified innards. After developing in this form for several months, the larvae will eventually metamorphose into an adult diving beetle capable of swimming, walking, and flying, which then leaves the vernal pool as it dries up.