Aqua Aqua (アクアアクア?), known in Europe as Aqua Aqua: Wetrix 2, is a puzzle video game for the PlayStation 2 and is the sequel to game Wetrix. It offers fewer features than Wetrix, but it features improved graphics and a new story mode. The aim of the story mode is to travel through four eras and survive attacks from monsters from each one. To survive the attacks simply get enough points to power up the shield. There is also an unlockable world if the player gets enough points. The game also offers a two player vs mode and a single player puzzle mode.

The title was a launch game for the PlayStation 2 release in Europe.