Medaka Rice Fish

Medaka Rice Fish – Hardy, Colorful Fish for Outdoor Ponds & Nano Tanks

The Medaka Rice Fish (Oryzias latipes) is a small, peaceful freshwater fish native to East Asia. Known for its adaptability, gentle nature, and wide range of colors (including orange, white, platinum, and iridescent strains), the Medaka is ideal for both indoor aquariums and outdoor ponds or tubs.

Hardy in a variety of conditions, Medaka are one of the few tropical fish that thrive in unheated or even cold water environments, making them perfect for seasonal ponds, patio tubs, or low-tech setups.

Scientific Name: Oryzias latipes
Common Names: Medaka, Japanese Rice Fish, Ricefish, Japanese Killifish
Size: 1–1.5 inches
Temperament: Peaceful, Social
Tank Size: 5 gallons and up (great for outdoor tubs, patio ponds, and nano aquariums)
Water Parameters:

• Temperature: 64–82°F (18–28°C)

• pH: 6.5–8.0

• Hardness: Soft to moderately hard (5–20 dGH)

• Can tolerate cold water and unheated tanks