Tosakin is also very sensitive to changes in water quality and some experts actually suggest using slight greenish water containing algae. In order to produce the desired butterfly tail, some aquarist has gone to the extreme by keeping the fish in a small container to limit the growth and length of the body while allowing the tail fin to develop. In Japan, Tosakin is highly prized and sought after and various competitions are organized to select the best fish.
Other Goldfish Varieties: ranchu, fantail, pearlscale, pom-pom black moor, celestial, shubunkin, oranda and common goldfish
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