Yokan is a Japanese sweet made from agar, sugar, arrowroot powder, water, and adzuki bean paste. It ends up something like Turkish Delight. Sometimes additional flavourings such as fruit or chestnuts are added. Westerners tend to prefer these, finding that for them the plain ones have no taste.
The day before the Koi hatches the eyes in the egg will have a shine to them. Soon afterwards, the young Koi will begin to wriggle then, gradually, over the next few hours, it will break out of its 'shell'. It will take three to four days for the Koi eggs to develop and the fry to hatch at temperatures of 68 -7l.Koi fry can develop at temperatures as low as 63, in which case their incubation will take five or six days, or as high as 77, which will decrease their hatching time.he day before the Koi hatches the eyes in the egg will have a shine to them. Soon afterwards, the young Koi will begin to wriggle then, gradually, over the next few hours, it will break out of its 'shell'. It will take three to four days for the Koi eggs to develop and the fry to hatch at temperatures of 68 -7l.
Koi is an egg-laying fish and the parents will not hesitate to eat eggs as well as free swimming offspring. During professional Koi breeding where a large survival rate is important, the eggs will therefore be placed in their own pond.hen the female deposit her eggs at the spawning mop, the males will immediately fertilize them. The spawning mops can then be removed and placed in the fry raising pond. During Koi breeding, it can be a good idea to add 0.2 mg of malachite green for each liter of water in the fry raising pond to prevent fungus attacks.