What is the relationship between the Crucian Carp and the domesticated goldfish (*Carassius auratus*)?

Answer

Goldfish are selectively bred variants of the Crucian Carp

The text specifies that the goldfish is essentially a selectively bred variant of the crucian carp. When released into the wild, goldfish can revert in appearance, causing identification issues.

What is the relationship between the Crucian Carp and the domesticated goldfish (*Carassius auratus*)?
faunaUSAfishCarp