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Moonlight Sonata: Fish's Nocturnal 'Singing' Secrets Revealed

In one of the marvels of nature, males of a fish species called the plainfin midshipman that dwells in Pacific coastal waters from Alaska to Baja California court females during breeding season using a nocturnal "love song" with an otherworldly sound. Scientists have wondered what makes these fish sing only at night. A study published Thursday provides the answer. Laboratory experiments showed that the fish's vocalization, a low-frequency hum like a foghorn, is controlled...

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