in taxon Tetrapoda surface structure median fin fold Surface structure that will develop into one of the median fins. Extends from dorsal surface of fish, caudal to the 8th somite, to the ventral surface ending at the caudal side of the vent. median fin ZFA:0000040 UBERON:2000040 This class was sourced from an external ontology (teleost_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon median fin-fold median fin-folds