Samiya

The Sea Temple is an underwater palace built by the People of the Water. It has a complex buildup and hold the Sea Crown in its depths.

The People of the Water built the temple were the Manaphy lived and so all Manaphy had a sort of homing instinct to get to the temple. It cannot be seen regularly, as it blends in with the water, but will appear visibly under a lunar eclipse. It floats around with the current currently, but used to stay put.

The temple started to sink when Phantom pulled crystals out of the Sea Crown. But, it returned to normal after the crystals were placed back in the Sea Crown.