Nov 202011

Life on the reef can be stressful. Fortunately for some of its fishy inhabitants, they can call on a masseur to soothe their nerves–the first non-primate known to do so. Surgeonfish make regular use of cleaner wrasse to remove their parasites and dead skin. Scientists, noticed that the cleaners seem to offer another service too: they can placate an agitated surgeonfish by rubbing back and forth on its pelvic and pectoral fins.


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