Peking Glass Vase White & Frosted Cameo Glass w Koi Fish, Marked.

With numerous allegorical values in the Chinese culture, the koi (carp) fish is a powerful symbol of strength and preservice. The scales and whiskers of the fish resemble those of a dragon, a great symbol of power in China.

According to Feng Shui, a fish represents wealth and prosperity

Marked at the bottom with a character, that very much looks like the number 5, but it could be something else as well..