Term: ventral fin fold postero-ventral region
Name: ventral fin fold
Synonyms: anal fin fold, tail fin fold, ventral fin
Definition: Region of the median fin fold that develops into the anal and caudal fin.
Ontology: Anatomy Ontology [ZFA:0001069]

Name: postero-ventral region
Synonyms: posteroventral region
Definition: Anatomical region that overlaps the posterior and ventral regions of a body or body part.
Ontology: Spatial Ontology [BSPO:0000035]