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A healthy coral reef is noisy, full of the croaks, purrs, and grunts of various fishes and the crackling of snapping shrimp.

At night, shallow reefs resound with snapping shrimp and the crunch of parrot fish chomping on coral.

Oysters lack ears but sense sound vibrations, so the team wondered if the larvae could follow a sonic beacon of their own: the crackle of snapping shrimp.

But along with shouting fish and snapping shrimp, there appears to be a new addition to the nautical ensemble: the stingray.

To test this idea, they glued the goggles shut on some snapping shrimp, preventing water from exiting the orbital hood.