Beluga whales are highly intelligent animals with notable cognitive capabilities. They have large brains relative to their body size, weighing around 2041 grams on average, which is heavier than dolphin brains. Their brains have many folds and ridges, providing more surface area for complex thinking. The neocortex, responsible for functions like learning, problem- solving, and emotions, is particularly well-developed in belugas. They also possess spindle cells linked to communication, empathy, and learning. Belugas exhibit advanced behaviors indicative of high intelligence, including the ability to mimic human speech and other sounds, use basic tools like rocks for skin care, and respond well to complex training involving symbols and gestures. They demonstrate flexible thinking, creativity, and social communication skills through a wide array of vocalizations used for echolocation and interaction. Their intelligence is considered sophisticated, placing them among the smartest marine mammals known.