natural cause

(i) means a weather, climatic, hazard, or biology-related event, such as—

(I) a hurricane;

(II) a flood;

(III) a harmful algal bloom;

(IV) a tsunami;

(V) a hypoxic zone;

(VI) a drought;

(VII) El Niño effects on water temperature;

(VIII) a marine heat wave; or

(IX) disease; and

(ii) does not mean a normal or cyclical variation in a species distribution or stock abundance.