LJFL
LJFL (lower jaw-fork length) means the straight-line measurement of a fish from the anterior tip of the lower jaw to the fork of the caudal fin. The measurement is not made along the curve of the body.
Source
50 CFR § 635.2
Scoping language
In addition to the definitions in the Magnuson-Stevens Act, ATCA, and 600.10 of this chapter, the terms used in this part have following meanings. If applicable, the terms used in this part supercede those used in 600.10: