Does a tarfish have spiny kin2/16/2024 They also explain how the spines could evolve out of ancestral soft-rays independently in different lineages of fish. In the study published in PNAS, researchers at the University of Konstanz from a team led by Dr Joost Woltering, who - together with his PhD student and first author of the study Rebekka Höch - works in the laboratory of Professor Axel Meyer, show how fin spines arise during embryonic development. Therefore, the evolution of fin spines is considered a major factor in determining diversity and evolutionary success amongst fishes. ![]() These fishes even evolved separate "spiny fins" consisting of spines only. With over 18,000 members, the spiny-rayed fish are the most species-rich fish lineage. ![]() As fin spines serve the purpose to make the fish less edible, they offer a strong evolutionary advantage. Two types of fin elements Indeed, many fish species possess two types of fin elements, "ordinary" soft fin rays, which are blunt and flexible and primarily serve locomotion, and fin spines, which are sharp and heavily ossified.
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