Splashdown is a character in The Incredibles.
Splashdown was a Super whose secret identity was an oceanographer. Prior to the events of the film, he was involved in a suit malfunction which involved his cape being sucked into a vortex. It is unknown whether this killed him, since he is listed as missing in action in his NSA file.
Splashdown possessed the ability to fly, as well as numerous water-based powers such as underwater high-speed travel, the ability to breathe underwater and communication with underwater lifeforms. His weakness was the need to remain intensely hydrated.
In his NSA file, Splashdown is noted as being fiercely independent and having an obsession with finding the lost city of Atlantis.