Term: median fin fold mesenchyme
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: mesenchyme
Synonyms:
Definition: A mesh-like cell arrangement, less compact than an epithelium.
Ontology: Anatomy Ontology [ZFA:0000393]