Fishing or to fish means:
(1) The catching or taking of fish;
(2) The attempted catching or taking of fish;
(3) Any other activity that can reasonably be expected to result in the catching or taking of fish; or
(4) Any operations at sea in support of, or in preparation for, any activity described in paragraphs (1) through (3) of this definition.
50 CFR § 300.2
In addition to the definitions in each act, agreement, convention, or treaty specified in subparts B through K of this part, the terms used in this part have the following meanings: