How big is a dolphin's brain?

Brain Power We always knew whales and dolphins showed intelligence, but new research is revealing how little we really know. They're more like us than you might have suspected yet at the same time have also evolved to be perfectly adapted for their marine home. read more

What has been found is that the size of the brain for a human and a dolphin are almost the same. This is based on information that shows the evolution of the cetacean brain over a period of more than 47 million years! Such studies have given experts information about the large size of the brain for toothed whales. read more

Dolphins and other marine mammals have pretty big brains compared to the size of their bodies. That’s one indication of high intelligence, and anyone who has seen them perform at an aquarium or zoo can attest to that fact. read more

Killer Whales (Orcinus orca ) have the second largest known brain mass of any extant animal. (5.4-6.8 kg) Bottlenose dolphins (Tursiops truncatus) have an absolute brain mass of 1,500–1,700 grams. This is slightly greater than that of humans (1,300–1,400 grams) and about four times that of chimpanzees (400 grams). read more

The dolphin's brain is the second most powerful and complex brain in animals (next to the human brain, of course). Intelligence may be defined as a measure of the brain's ability to process information in ways that solve problems and enhance one's survival. read more