Some extreme versions of the goldfish live only in aquariums—they are much less hardy than varieties closer to the "wild" original.
The vast majority of goldfish breeds today originated from China.
They have long, streamlined bodies and are faster swimming than shorter egg-shaped goldfishes.
They have no headgrowths like orandas, lionheads, and ranchus, narial bouquets like pompoms, or curled gills like curled-gill.
Most goldfish varieties are capable of living in outdoor ponds.