Coral reefs have been caught 'sleeping' - even without a nervous system, scientists claim

Coral reefs have been caught 'sleeping' - even without a nervous system, scientists claim

Corals look like they’re just quietly existing, but a new study has found they run a proper day-night rhythm - while the coral rests, its microbial roommates keep workingResearchers have uncovered a night-time rest cycle in corals that has helped keep their symbiosis from tipping into damage.Coral reefs are busy, bright, and constantly in motion, even if the actual coral looks like it’s not doing all that much.Still, plenty of animals use the ni…