| Name: | caudal fin |
|---|---|
| Synonyms: | tail, tail fin |
| Definition: | Fin that is the most posterior median fin. It is composed of a complex of three modified centra and modified neural and hemal arches and spines. |
| Ontology: | Anatomy Ontology [ZFA:0001058] |
| Name: | hemal spine |
|---|---|
| Synonyms: | haemal spine |
| Definition: | Hemal spines are extensions of hemal arches in the ventral skeletogenous septum of the caudal region. |
| Ontology: | Anatomy Ontology [ZFA:0001364] |