BiOrb Small Coral Sculpture This highly detailed BiOrb Small Coral Sculpture adds a huge amount of interest to any BiOrb. This beautiful coral style aquarium sculpture will look great inside any marine aquarium. This Small 5" Tall Clamshell Sculpture is designed to cover the center bubble tube in the Baby BiOrb 15L, BiOrb Life 15L & BiOrb FLOW 15L Aquariums.