How much of their conscious brain do dolphins use?

Dolphins are believed to use a significant portion of their brains, but the idea that they use a specific percentage of their conscious brain, like the often-cited 10% in humans, is a misconception. They have large brains relative to their body size, and studies suggest that a high level of their cerebral cortex is involved in processing sensory information and complex behaviors. Dolphins exhibit advanced cognitive abilities, such as problem-solving, social interaction, and communication, indicating that they utilize much of their brain function effectively. However, the exact percentage of conscious brain usage is not easily quantifiable.