Limits RegistryPUBLIC RECORD
Limits RegistryThe bottlenose dolphin (Tursiops truncatus) has one of the highest encephalization quotients of any non-human animal, commonly cited around 4.0-5.0 — second only to humans (EQ around 7.0-7.5) — reflecting its complex brain relative to body size, associated with sophisticated social behavior, tool use, and self-recognition.
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The bottlenose dolphin (Tursiops truncatus) has one of the highest encephalization quotients of any non-human animal, commonly cited around 4.0-5.0 — second only to humans (EQ around 7.0-7.5) — reflecting its complex brain relative to body size, associated with sophisticated social behavior, tool use, and self-recognition.
The highest encephalization quotient — actual brain mass relative to the mass predicted for an animal of its body size — documented among non-human species, using the standard EQ formula from comparative neuroanatomy.
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Permanent ID limitsregistry.com/limits/LR-LARGEST-ANIMAL-BRAIN-TO-BODY-RATIO
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Limits Registry. LR-LARGEST-ANIMAL-BRAIN-TO-BODY-RATIO. Highest brain-to-body size ratio (encephalization quotient) of any non-human animal. 2026.