9) A goldfish lays around 2,000 eggs at a time.

Goldfish can lay up to 2,000 eggs at once during spawning season. The eggs are typically laid in shallow water and then fertilized by the male goldfish. The eggs usually hatch within three days and the fry (baby fish) will become mature adults within one year. The fry are highly vulnerable to predators and require special care if they are to survive.

10) A goldfish is born with a brownish color.

Goldfish are born with a dull brownish color, which they eventually lose as they grow older. This happens when their cells change and the red and yellow pigments are released. They also develop their characteristic barbells and caudal fins over time. Another interesting fact is that they can recognize their owners!