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Oryzias latipes/Medaka/Japanese Rice Fish

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1 Oryzias latipes/Medaka/Japanese Rice Fish on Sat Oct 17, 2015 12:31 pm

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The Japanese Rice Fish Oryzias latipes have been popular aquarium fish for many years. They have been kept in the aquarium since the 17th century in Japan. They are 'amphidromous' meaning they are fish that move between fresh and salt water during some part of their life cycle. They are known by several common names including Japanese Medaka, Japanese killifish, Medaka, Rice Fish, and Ricefish.

The wild version of fhe Japanese Rice Fish is not particularly attractive, but fortunately for the aquarist it comes in many colors. There are a few selectively bred colors varieties like the Gold Medaka and more recently, the Moonlight Medaka. These colorful fish are quite attractive and well worth keeping in the home aquarium.

The best known version of the Japanese Medaka is the Gold Medaka (gold color morph), which has been around for hundreds of years. The Moonlight Medaka is a shiny silver color morph that is a relatively new addition to the aquarium hobby. These are genetically enhanced versions of this fish that contain a sea jelly gene that causes them to glow under a black light. The Moonlight Medaka is a very sturdy fish that can live in warm or cold water. This cold water tolerance also makes it a good choice as a pond fish.

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2 Re: Oryzias latipes/Medaka/Japanese Rice Fish on Thu Oct 22, 2015 7:57 am

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