2019 LDWF Commercial Fishing Regs - Page 10



MEASURING FISH
Place the fish on its side on a flat board with its jaw closed:

Total Length - Measure in a straight line from the tip of the snout to the extreme tip of the tail fin. Squeeze OR rotate the tail so you can
determine the maximum length of the fish (Figure 1 and Figure 2).

Fork Length - Measure in a straight line from the tip of the snout to the fork of the tail (Figure 3).

Curved Fork Length - Measure tracing the contour of the body from the tip of the upper jaw to the fork of the tail (Figure 4).

Carcass Length - Measure the curve from rear edge of gill opening to the front edge of the caudal keel (the ridge found just before the tail
fin) (Figure 4).

Lower Jaw Fork Length - Measure from the tip of the lower jaw to the midline of caudal fin. This measurement is used for billfish such as
swordfish (Figure 5).
Figure 3
Figure 1: Squeezing
Fork Length
Squeezed tail.
Total Length
Figure 4
Curved Fork Length
Caudal Keel
Upper Jaw
Figure 2: Rotating
Gill Opening
Carcass Length
Figure 5
Rotated tail.
Total Length
Lower Jaw Fork Length
8
Fish illustrations by Duane Raver.

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