Ralas

The Ralas are a race of frogmen from a hidden second satellite of Earth.

Biology
The Ralas had green mottled skin and stood to seven to eight feel tall. They walked on bowed, powerful legs and had arms that ended in webbed paws. Their heads were bulbous in that they were wide, unwinking frog-eyes that sat on the sides. Their mouths were white-lipped and white-lined. They also dieted on green man blood.

Culture
The Ralas were an advance culture possessing anti-gravity boats that were also amphibious. They had weapons that were black metal tube similar to pistols that could cause objects to vanish. The constructed an enclosed city that could only be accessed via underwater passages within the sea that surrounded it.

Appearances

 * Second Satellite by Edmond Hamilton (1930)