Oryzias latipes, commonly known as the Japanese rice fish or medaka, is a small freshwater fish native to East Asia. It typically grows to about 3 to 5 centimeters in length and is known for its adaptability to various aquatic environments, including rice paddies and slow-moving streams. The fish has a slender body and can display a range of colors, including yellow, green, and blue. This species is often used in scientific research due to its rapid reproduction and transparent embryos, making it an ideal model organism for studying genetics and developmental biology. Oryzias latipes is also popular in the aquarium trade, appreciated for its hardiness and ease of care.