medaka rice fish outdoors - winter water temperatures

[@berenicehickey9755]

Hi from Singapore! Rainy here!

[@km-qh3rs]

hi, but at least you don't have any problems with cold weather.

[@andreashessler838]

I've found that a couple of the newer strains do not seem to be doing well outside for winter (UK).

[@km-qh3rs]

From what I've heard it appears that, for many of the newer, very fancy strains to thrive, they need to be provided with water quality and temperature conditions similar to tropical fish. Presumably one factor is that these strains have become less robust because they have been intensively, selectively bred to produce the mutations resulting in the pretty sparkles, lame, long fins etc. Also, to produce a new strain, the selective breeding process may need to go through many generations of medaka. To speed up this process, commercial breeders probably raise and grow the medaka in water temperatures of 26 to 28 degrees celcius so that they can get maybe 6 generations a year. Probably this results in the resultant new strains losing some of their ability to survive OK in the low temperatures of a UK winter.