Perhaps no other fish is as commonly-kept, or misunderstood, as is the Goldfish. Often thought of as a “disposable child’s pet”, Goldfish excel on intelligence tests (overseen by “real scientists”, not doting owners!), and can reach 18 inches in length and 20+ years of age. But they will do none of these things in the typical - and completely unsuitable - “ Goldfish bowl”, so please read our species descriptions carefully!