in taxon confers advantage in confers advantage in has skeleton Euarchontoglires Aves appendage fin fins EFO:0000875 SCTID:73003005 AEO:0001004 ZFA:0000108 TAO:0000108 This class groups together various structures that may have arisen through convergent evolution, including, for example, the dorsal fin of a cetacean VSAO:0000099 Surface structure involved in locomotion.[VSAO] Wikipedia:Fin MESH:D058500 MIAA:0000087 AAO:0010374 XAO:0000002 An external projection of an aquatic animal as a fish used in propelling or guiding the body[BTO]. BTO:0004649 MAT:0000087 UBERON:0008897 Surface structure involved in locomotion.[TAO] fin skeleton