The Behemoth is fought in the prologue of Crisis Core -Final Fantasy VII-.
Being the first boss fought in the game, Behemoth is easy to defeat. The player should avoid its claw and front, and try to land a few sword attacks from behind for Critical Hits. When the Behemoth raises its tail, it is a sign that it will unleash its special attack. The player can then quickly guard against his Gyro Tail attack or dodge if possible. Zack can heal with Potions when needed.
Behemoth is a beast mentioned in Job 40:15–24. In addition to mythological creatures, it is likened to elephants, hippos, rhinos, and bison. Metaphorically, the term behemoth denotes "an extremely large or powerful entity."