Astonishingly, a great white shark’s brain is Y-shaped and is approximately 60 centimeters long. While it is not particularly large or heavy, especially in comparison to the entire size and body mass of the shark, there is no concrete evidence that size has a direct correlation to ability when it comes to the brain. What has been discovered is that shark species that do not hunt or approach prey stealthily (such as bottom-feeders and filter feeders) have smaller, lighter brains than their hunting sharks. The brain consists of different regions, the hind-brain, mid-brain and forebrain which consist of various specialized regions too. These regions look like pearls, strung on a complex string. The brain is hollow in most places, perforated by uneven ventricles (a hollow part or empty space within a solid object in an organ). The ventricles are filled with a so-called cerebrospinal fluid, which assists with the chemical regulation of the brain. The shark’s sense of smell is particularly acute, and takes almost two-thirds of the brain. Of course, the brain is responsible for the usual body functions as well. It receives and processes messages of hunger, exhaustion, electromagnetic pulses and so on. There were even reports of sharks demonstrating a degree of curiosity (a behavior we also witness from our boat), this is quite an advanced impulse amongst animals that were believed to be stupid. This proves that we have only scratched the surface of these fascinating animals and the qualities that make them so unique.