Bluefin Killifish Flamboyant Fin Colors
Fish use their fins for swimming, but fins can also advertise a fish’s social status and health. In a new study, researchers report that for the male bluefin killifish (Lucania goodei), each colorful fin communicates different messages to other fish. They’re called “bluefin” killifish, but these fish often have red, yellow and/or black markings on their fins. University of Illinois animal biology professor Rebecca Fuller noticed these colorful fins while snorkeling in Florida and decided to find out what causes the variation. “In some of the males, the anal fin was…
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