Term: median fin fold anatomical margin
Name: median fin fold
Synonyms: median fin
Definition: 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.
Ontology: Anatomy Ontology [ZFA:0000040]

Name: anatomical margin
Synonyms: edge, margin
Definition: Fiat anatomical region extending a short distance from the boundary of an object inwards.
Ontology: Spatial Ontology [BSPO:0000006]