Found this guy in our pool. The tarantula hawk wasp
These wasps require a tarantula to serve as a host or ‘meal” for their larvae. The female wasp will look for a burrow that contains a tarantula and then disturb the webbing around the burrow to coax the tarantula to come out. She stings the tarantula on its underside paralyzing it and drags it down into a burrow. She lays one egg on the paralyzed spider and seals the opening to the burrow. When the egg hatches it eats the still living spider.
They have the most painful (but not fatal) sting of all animals in the world. Still, I helped him out of the pool.