Fish Can Count, but Only Up to Four

Fish Can Count, but Only Up to Four

Fish have the limited ability to count directly up to four, say scientists.

Christian Agrillo, an experimental psychologist at the university of Padua in Italy, said that it was during a study on North American mosquito fish that their limited mathematical ability was observed.

The researcher said that the fish used its mathematical ability to count the number of other fish around it.
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