What would happen if only one sponge moved?

If only one sponge moved, it could disrupt the balance of the surrounding ecosystem, especially if it plays a crucial role in filtration or habitat. The movement might create changes in water flow or nutrient distribution, potentially affecting other marine organisms reliant on the sponge's presence. Additionally, if the sponge is part of a larger colony, its movement could lead to isolation or stress in the remaining sponges. Overall, the ecological impact would depend on the sponge's role within its environment.