principle caudal-fin rays
Fin rays forming the dorsal or ventral margins of the caudal fin, supported by the supported by the hypural and parahypural.
Used in 1 profile
Ichthyological terms, not general ones.
Fin rays forming the dorsal or ventral margins of the caudal fin, supported by the supported by the hypural and parahypural.
Used in 1 profile