goldfish shoal in pet shop, yellow and orange eastern ornamental breed of wild carp ancestor, popular commercial hybrid

carassius auratus oranda koi goldfish cyprinidae oriental chinese abnormal cometlike long tail cult selective breeding genetics artificial selection mutation deformity sensitive slow growing aqua farming temperate white coldwater freshwater aquarium nature fauna water animal hobby aquaculture fishkeeping business trade underwater decorative fish tank instinct habitat ecology vulnerable anubias barteri burhead threat protection pet easy sociable ichthyology controlled conditions shallow dof dark background