When measuring fish, standard length is the length from the tip of the upper jaw to posterior end of the fleshy peduncle.

distance form the most anterior part of the head to the posterior margin of the last whole vertebral centrum

The straight distance between the tip of the snout and the base of the caudal fin rays.

The length of a fish from the front of the upper lip to the posterior end of the vertebral column (the last element has a broadened hypural plate forming the bony support for the caudal fin rays). In small dead fish, the end point is detected by bending the caudal fin to one side. In fishery work, as a result of the use of the measuring board, standard-, fork- and total length are taken from the most anterior part of the head. ( 126) See chart for details.

Body length, measured from the tip of the upper jaw to the notch in the fluke (straight line) for cetaceans and from the snout tip to the end of the tail (straight line, belly up) for pinnipeds.

The length of a fish as measured from the tip of the snout to the hidden base of the tail fin rays.

(SL) Distance from tip of the snout along the midline to a vertical line through the posterior edge of the hypural plate.