A Fish Quintet.

From the group Quiet Ensemble:

Quintetto is an installation based on the study of casual movement of objects or living creatures used as input for the production of sounds. The basic concept is to reveal what we call “invisible concerts” of everyday life. The vertical movements of the 5 fishes in the aquarius is captured by a videocamera, that translates (through a computer software) their movements in digital sound signals.

They’ve also done some work with mice, snails, and fruit, but the fish are the most classically musical of the bunch.

For more stimulating animal art, watch this video of a cat in a shark costume riding a Roomba around.