If the amount of algae in the ocean decreases by 50%, the population of GOBY fish, which are consumers of algae, could potentially decrease as well. This is because GOBY fish rely on algae as their primary food source and a significant reduction in algae availability can lead to a decline in their population. However, the exact impact on the GOBY fish population will depend on various factors such as the availability of alternative food sources and the adaptability of the GOBY fish to changing conditions.
