What is Medaka?
Medaka is the fish of the Adrianichthyidae family and the genus oryzias , which is usually referred to as rice fish. Sometimes it is called a Japanese killer. In addition to Japan, it is located in most Asia, including Korea, China and Vietnam, usually in ponds, marshes and rice fields.
Medaka is a very small fish, usually reaching about 1.6 inches (4 cm). His body is very slim and prolonged, with arched back. Thanks to a very small size, Medaka does not mean a favorite fish for fishermen, but its clear color and the appearance has long made it a favorite aquarium enthusiast. In nature, fish are usually brown or yellowish gold. Capture breeding has increased its color range, with white, yellow or pure orange variations that are not unusual.
As an aquarium is a relatively durable fish that can survive to a wide range of water conditions. Water temperatures may vary from 65 to 75 degrees Fahrenheit (18 to 24 Celsius) and pH levels can range from 7 to 8. As long as it is mixed with non -aggressive RYBami of similar size, makes a very good fish for community tanks.
fish care is also easy. Medaka will eat various foods, from flakes and frozen food to a wide range of frozen foods. Like many smaller fish, it prefers to have enough cover in the tank that hides when it is stressed. It also requires a certain degree of water movement, which can be provided by an air stone or filter.
Medaka is also a popular fish for researchers due to their hardness and relatively fast breeding. Medaka was greatly used in environmental research. In the past, tests have been carried out on fish including carcinogenesis and related fields of study. Genetic manipulations on fish have only been captured in captivity, including a type that lights florescent green.
The use of a Japanese killer as a research tool has even spread to the universe. In RocE 1994 were four medacs on board the USS Columbia shuttle transport for various tests, because it was the only types of fish known to withstand microgravity. The fish not only thrive in the shuttle, but behaved, but became the first vertebrates to produce descendants in space. Medaka continued on board Columbia laid 43 eggs, some of which hatched while still in space. All fish that hatched both in space and back on the ground showed no noticeable side effects from their travels.