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This document discusses a study of the brains and evolution of Hawaiian tropical fish. The study finds that fish living in complex coral habitats may have larger brain sizes due to higher encephalization from navigating their complex environment. Greater sexual selection was also found to lead to greater changes in brain structure, with strong sexual dimorphism observed in tail width, electric signal amplitude, and different "songs" between sexes used for communication similar to birds. One species, Gymnotu

Author

Michel Grossauer

Language

EN