Samiya

Samiya is the location of an ancient temple constructed by the People of the Water, and also serves as the location of the civilisation's defining feature, the Crown Jewel.

Overview
Samiya was built many eons ago by the People of the Water, as a homage to the Manaphy species, and as such the Sea Temple is constantly moving locations due to the current. It is said that Samiya was constructed to serve as a home for the Manaphy species, and this is present due to the fact that all Manaphy instinctively know the location of the Temple from birth.

Samiya is also sought after by people who wish to steal its crown jewel, the Sea Crown from the center of the Temple. As a countermeasure, the People of the Water adapted a cloaking mechanism around the entirety of Samiya, which in effect allows it to blend in with the surrounding water and therefore go unnoticed. However, this cloaking ability is negated on the night of a lunar eclipse, which The Phantom takes advantage of.

The Sea Crown, hidden deep in the center of Samiya, is comprised of a variety of large crystals which serve as the power source behind the Sea Temple. When one or more of these crystals are removed from the base, this results in the dissipation of the energy field enveloping Samiya and allows for water to seep in at a rapid rate. This process can only be reversed if the stolen crystals are returned back to the Sea Crown.

When seen in its entirety, Samiya is roughly the size of a large city. The main base at the center of the Sea Temple consists of a spiralling column ascending upwards into a spire-like peak.

Trivia

 * The Japanese name for Samiya, Akusha, is derived from アクア aqua and 社 sha respectively.
 * In the Viz Media translation of the manga adaptation of the movie, Samiya is referred to as Akusha. Alternatively, in Chuang Yi's manga adaptation of the movie, it was referred to as Samaya.