These are signs of intelligence. Dolphins play with their food, with seaweed, with each other, with other animals, and with boats. The smartest dolphin is the bottlenose dolphin. They have been known to understand words. Rough-Toothed Dolphins are also known to understand commands.
People say that the cleverest dolphin is the orca.
Threats The dolphin's worst enemy is the shark, but humans are slowly turning into the shark's worst enemy. Thousands of dolphins die every day in fishing nets.