Medaka Youkihi Orange is a specific variety of rice fish, also known as Japanese Killifish or Oryzias latipes. These fish are small, freshwater fish that are popular among aquarists due to their bright orange coloration and ease of care.

Medaka rice fish are native to Japan and can be found in rice paddies, streams, and ponds. They are a popular aquarium fish because they are hardy and easy to care for. They are also popular for scientific research, as they are used as model organisms in genetics and developmental biology.

If you’re interested in keeping Medaka Youkihi Orange rice fish, they are generally peaceful and can be kept in a community tank with other small fish. They prefer a planted tank with plenty of hiding spots and a temperature range of 68-78°F (20-26°C). They are omnivores and will eat a variety of foods, including flakes, pellets, and live or frozen foods such as brine shrimp or daphnia.

There are several species of killifish that are native to Japan, including:

1. Oryzias latipes: Also known as the Medaka or Japanese rice fish, this is the most commonly kept killifish species. It is often used in scientific research due to its ease of care and suitability as a model organism.
2. Oryzias sakaizumii: This species is native to streams and ponds in Japan and has a striking blue coloration. It is a popular aquarium fish due to its unique appearance.
3. Oryzias woworae: This species is native to the island of Sulawesi in Indonesia, but it is closely related to Japanese killifish. It has a bright orange coloration and is popular among aquarists.
4. Oryzias minutillus: This species is found in streams and ponds in Japan and has a silvery coloration with black markings. It is a relatively rare species in the aquarium trade.
5. Oryzias sinensis: Also known as the Chinese rice fish, this species is found in rice paddies, swamps, and other freshwater habitats in China, Vietnam, and other parts of Southeast Asia. It is closely related to Japanese killifish and is sometimes kept in aquariums.