Caudal: situated in or directed toward the hind part of the body. See also measurements.

Caudal base: the area of caudal fin attached to the body.

Caudal fin: the tail fin the median fin at the base of the tail.

Caudal keel:

Caudal peduncle: the region between the last ray of the anal fin and the base of the caudal fin.

Alternative forms for caudal : caudal base, caudal fin, caudal keel, caudal peduncle.