New research led by Cornell University scientists shows that sound production appeared in the ray-finned fishes (clade Actinopterygii) circa 155 million years ago, as it did in some tetrapods. New research by Rice et al. strongly supports the hypothesis that soniferous behavior is ancient, but independently evolved in multiple clades of Actinopterygii, as it is among tetrapods. This simplified fish family tree shows the evolutionary likelihood of...
