In Rebirth of Mothra II (1997), Dagahra – a winged reptile butt-head – is Mothra’s foe-du-jour in this fantasy/sci-fi action tale about the butt-headed people of Earth wrecking the environment and paying for it in the metaphorical manifestation of giant monsters.
There’s a couple different species of Mothra raining its mothiness down on Dagahra, including Rainbow Mothra and Aqua Mothra. Didn’t see any scuba tanks on Aqua Mothra, so I’m not sure how she was able to stay underwater without, like, drowning or needing the assistance of Mecha-Lifeguard.
The Ninai Kanai Temple rises from the sea floor where kids, looking to help Mothra, get in the friggin’ way. Pretty amazing special effects; when Dagahra covers Aqua Mothra with Barem (super poisonous starfish), you actually believe it’s all going down for real.
Had a tougher time subscribing to the color streams shooting out of Rainbow Mothra’s ass, though. But any movie that has poisonous starfish with future names gets my vote of approval.