Corals sleep like us, but their symbiosis does not rest
Sleep is essential for much of the animal kingdom. During the night, neuron and tissue repair mechanisms are activated to aid recovery from daily activity. This is risky: organisms that sleep are more vulnerable to predators. However, the phenomenon extends from mammals to invertebrates. Nevertheless, until now it was not known whether other, more ancient groups without neurons, such as corals, engage in any kind of nocturnal rest.
A study led by the Institute of Evolutionary Biology (IBE), a joint research center of the Spanish National Research Council (CSIC) and Pompeu Fabra University (UPF), has revealed ...