It is possible to get a Pre-emptive Attack on Aps, unlike against most other bosses in the game. Attacks to the back of Aps will inflict four times normal damage, as opposed to the regular two times for the majority of enemies. Aps is weak to Fire.
Aps's Sewer Tsunami attack is its strongest attack, but this attack damages Aps as well. The tsunami wave can come either forward, which causes more damage to Aps (between 180-192 HP) than the party, or backward of party, which causes more damage to the party than Aps (between 45-48 HP). It is used at certain points in the battle, as well after being hit by a magic attack. Aps's Lick attack inflicts always Sadness, which reduces damage taken but makes the party's Limit gauges fill at half speed.
The player is advised to have Aeris concentrate on casting Fire and healing the party. Using Cloud's Cross-slash Limit Break often paralyzes Aps for most of the fight. If Aps is paralyzed it will not counterattack with Sewer Tsunami.
- The "2nd opponent" refers to the character standing in the center of the party, usually Aeris if the player doesn't swap character positions.
- Aps has two different flinch animations: one for the Sewer Tsunami ability and one for all other attacks.
Abzu, also known as apsû, was the name for the primeval sea below the void space of the underworld (Kur) and the earth (Ma) above. It may also refer to fresh water from underground aquifers that was given a religious fertilizing quality. Lakes, springs, rivers, wells, and other sources of fresh water were thought to draw their water from the abzu.
- Aps is the first "non-robotic" boss faced in the game.