Aquatank

The Aquatank (アクアタンク) is an Emblem Heartless that is found in Kingdom Hearts and Kingdom Hearts: Chain of Memories.

Aquatanks are immense angler fish-like Heartless that form a symbiotic relationship with Screwdivers. They are exclusively found in Atlantica and End of the World. Aquatanks are one of two giant Heartless in Atlantica, the other being the Sheltering Zone. This Heartless is similar to the Jet Balloon that is found on Hook's Ship's deck in Kingdom Hearts Final Mix and has a symbiotic relationship with Missilediver.

An Aquatank, like a Sheltering Zone, is docile during battle unless disturbed. When disturbed, it unleashes powerful attacks similar to a Large Body's. An Aquatank will always appear with three Screwdivers holding onto it (unless the maximum number of enemies on-screen is reached as the Aquatank appears, causing the Aquatank to spawn alone). When its antenna glows, all nearby Screwdivers are powered up.

In Kingdom Hearts Re:Chain of Memories, Aquatanks will attack without provocation and their attacks are usually used with powerful cards (around 6). Although Aquatanks attack without provocation, they will not readily attack Sora as much as other Heartless. Unlike in Kingdom Hearts, Aquatanks will appear without Screwdrivers attached to them.

Kingdom Hearts: Final Mix introduced a variant to the Aquatank called the Jet Balloon.

Kingdom Hearts
''Heartless resembling a fish that calmly swim the seas. They are often carrying Screwdivers. Leisurely large creatures that do not attack unless provoked.''

Kingdom Hearts: Chain of Memories
A fish-like Heartless that lazily wanders the sea.

The Aquatank attacks with Thunder or by whirling its sizable body about.

Kingdom Hearts

 * Atlantica
 * End of the World

Kingdom Hearts: Chain of Memories

 * Atlantica