Betta ornaments are an exciting way to decorate your aquarium. With something for all tastes, they are an affordable way to enhance your display using fish-safe materials suitable for coldwater and tropical set ups.. Betta pirates treasure chest is a bright and attractive ornament which will look interesting in any aquarium. The lid remains closed and there a few holes in the sides to allow fish in to either hide or swim through.. Approximate dimensions 15cm l x 10cm w x 9.5Cm h .