Medaka is a small freshwater fish native to Japan, known scientifically as *Oryzias latipes*. It typically grows to about 3 to 5 centimeters in length and is often found in rice paddies, ponds, and streams. Medaka is popular in aquaculture and is used in scientific research due to its transparent embryos, which allow for easy observation of developmental processes. This fish is also appreciated in the aquarium trade for its vibrant colors and hardiness. Medaka can thrive in various water conditions and is often kept in community tanks. Its diet mainly consists of small insects and algae, making it an important part of its ecosystem.