The Emperor Sahagin is an enemy in Crisis Core -Final Fantasy VII-.
Beware of this enemy's capability of giving the Invincible status effect to its allies. Cast Hell Thundaga to give it Silence, continued with Gravity to weaken it, then finish it off with sword attacks. One can also use Costly Punch or use Graviga and finish with Costly Punch. Be on guard to dodge its Heartless Jump attack, otherwise Zack's HP will be immediately reduced to 1.
Sahuagin (often misspelled or transliterated "sahagin") are fishlike, monstrous humanoids that appear in the Dungeons & Dragons role-playing game.