Entrepreneurship & Home Business

Breeding and Culture of Goldfish

Goldfish is a small member of the carp family (Cyprinidae). It is called goldfish because it started from a gold variety of silver carp. They lack barbell which distinguishes it from common carp with two barbells.

Goldfish is one of the earliest fish to be domesticated and still one of the most commonly kept aquarium fish.  It originated from China and introduced into Europe in the late 17th century. There are more than 100 beautiful varieties of goldfish at present which were developed by Korea, Japan, and China.

The average lifespan of goldfish in optimal conditions is 5-6 years but it may live for more than 20 years (the world record is 49 years).

Biology

• Goldfish are omnivorous and voracious eaters.
• They are egg-scatterers. Female lays adhesive eggs to breeding medium and male fertilizes the eggs (30 g breeder may lay 3,000 eggs).
• They spawn all year round, once every 15-20 days.
• They reach sexual maturity in 6-8 months old.
• They are sub-tropical species, live in freshwater with pH of 6-8, water hardness of 5-19 dGH and temperature range of 4-31 °C.

Species: Shubunkin, Oranda, Ryukin, Lionhead, Dragon Eye, Pearlscale, Bubble Eye, Common

Sexual Characteristics

• Female:  Edge of pectoral fin with teeth-like serration and is rough. Depressed urogenital opening
• Male:  Edge of pectoral fin is smooth,