Formerly known as SQUID Surfer, Hydra's Challenge sees guests boarding jet ski-style vehicles, which are attached to one of two central turntables. These rotate around at high speed, throwing up spray as they go. Guests can steer the jet skis, causing them to move closer to or further away from the turntable.

Watching guests are able to set off “water bombs”, adding to the amount of water that is splashed into the air.