Aqua! (That's French for 'water').
This week, Sonica festival in Glasgow hosts Aquasonic for its UK premiere.
Nearly a decade in the making, Denmark's Between Music group worked with deep sea divers, scientists and instrument makers to create compositions for five musicians submerged in tanks of water.
As an art piece, it's incredibly striking. As a concept, it might not catch on.
But, water's been the subject of some music for a long time.
Here's a few water-based tunes. Please keep the tap running on this and pour yours in below:
Tim Darcy - 'Tall Glass of Water'
Paris Combo - 'Aquarium'
Nick Cave & The Bad Seeds - 'Water's Edge'