How big is a clown fish when it is a baby?

When clownfish hatch, they are typically about 0.5 inches (1.2 centimeters) long. As they grow, they can reach sizes of up to 4 to 5 inches (10 to 13 centimeters) in adulthood, but as babies, they are quite small and vulnerable. Their size allows them to hide among the anemones where they find protection and food.