Fish Want to Play Too

Yes, fish. These aquarium lap-swimmers and pursuers of flaked food aren’t known for their joie de vivre. Yet in one hobbyist’s tanks, scientists say they’ve captured a rare instance of fish playing around.

James Murphy is a herpetologist at the Smithsonian National Zoological Park. Although he professionally studies reptiles and amphibians, he keeps fish as a hobby. It was one of his cichlids—a 5-inch fish of the species Tropheus duboisi—that first caught his attention by inventing a game

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