Scientists in a joint study conducted by McMaster University, the University of St. Andrews, and Anglia Ruskin University have found that fish can recognize other fish and even develop preferences towards one another. According to the BBC, the researchers found that tiny sticklebacks are able to remember the individual fish they have spent time with, and are even capable of forming "cliques." "We think the fish prefer to shoal with familiar individuals and interact more with them," said Mike Webster, one of the...
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