Aquitar

Aquitar is a fictional planet in the Power Rangers universe. It was first seen during the television series Mighty Morphin Alien Rangers, a miniseries at the end of the third season of Mighty Morphin Power Rangers in which five Aquitians with Ranger powers come to Earth to temporarily take the place of the incapacitated Earthen Rangers.

=Planet Aquitar= Aquitar is almost completely covered by water, however there are mountains  and/or volcanoes poking up from underneath the surface. This water is especially pure, as evidenced from the fact that Aquitians can thrive on the planet.

It is home to the Aquitian race (see below), including the so-called Alien Rangers. It was attacked by the villainous Hydro Hog, though it is unclear if he originated from the planet or arrived there from elsewhere. It is also known for being the current residence of Billy, former Blue Ranger. He moved there after an instance of accelerated aging during Power Rangers: Zeo to be with Cestria, a female Aquitian that had been treating him, with whom he had subsequently fallen in love.

Aquitar was briefly conquered by the space pirate Divatox in 1998 as part of the galaxy-wide offensive launched by Dark Specter. It was liberated again when her army was vaporized by Zordon's energy wave in Countdown to Destruction.

=Aquitians= Aquitians are humanoid aliens originating from the planet Aquitar that look very much like humans except for their heads. An Aquitian's head is slightly larger than a human's and, from the shape, possibly lacks the upper skull. The face of an Aquitian is covered with cartilaginous ridges that resemble a mask, encircling the entire head. Female Aquitian are capible of growing hair, which can be seen jutting out of the back of their ridges. They appear to feed on pure water for the sustainment of their life force.

Known Aquitians
Several Aquitians are named during Mighty Morphin Alien Rangers, and they are as follows:
 * The Aquitian Rangers
 * Delphine
 * Aurico
 * Cestro
 * Tideus
 * Corcus
 * Cestria

Aquitians in other Power Rangers series
Aquitians have become one of the most famous races of aliens in the Power Rangers universe, possibly for being one of the first shown and possibly for having their own series. Aquitians have appeared in several other series since Mighty Morphin Alien Rangers, including:
 * Power Rangers: Zeo, in which the Alien Rangers themselves appeared and Billy left to live on Aquitar and be with his lover Cestria
 * Power Rangers: In Space, in which Aquitar was attacked by Divatox and defended by the Alien Rangers
 * Power Rangers: Time Force, in which an Aquitian is visible in the courtroom scene in the first episode in the year 3000
 * Power Rangers: Wild Force, in which Red Alien Ranger Aurico appears in the episode Forever Red
 * Power Rangers: SPD (an Aquitian, possibly the child of one of the Alien Rangers or of Billy Cranston by Cestria, can be seen in the training room)