These rare variants of Horsea can only be found in a mysterious lake inside a hidden grotto. They only feed on mineral deposits from the grotto in the lake. It gives their skin a shiny and smooth complexion.

Upon discovering the lake decades ago, researchers were surprised to see these variants of Horsea inhabiting the lake. Scientists believe these variants of Horsea adapted to the lake filled with mineral deposits coming from the grotto. The minerals have become its main diet. People are told not to go swimming in the lake due to health hazards these minerals may have on humans. Scientists and divers wear special suits to explore this lake. It has been recently discovered that there are underground tunnels leading to more hidden lakes within the grotto where many of these Horsea variants and relatives reside in peace, away from human contact.