What does the Mako's unique brain-to-body proportion force a re-evaluation of regarding marine intelligence?

What intelligence looks like outside the primate or cetacean lineage

When assessing the breadth of marine intelligence, species like dolphins and whales, known for their intricate social behaviors and communication, often dominate the discussion. The Shortfin Mako shark, which follows a vastly different evolutionary trajectory and often exhibits a more solitary existence, challenges this conventional view. By possessing a brain-to-body proportion that suggests superior neurological capacity within its own class, the Mako forces observers to broaden their definition of high-level intelligence beyond the established models observed in mammals like primates or cetaceans. It suggests that high cognitive function can manifest effectively within a fundamentally different biological framework optimized for a predatory, aquatic lifestyle.