Dolphins have a cortex (cerebral cortex, gray matter) more developed than humans.
They have self-awareness, complex thought streams, and give themselves unique personal names.
Dolphins rescue drowning people.
They communicate, talk, sing. There is no hierarchy with them.
They are very emotional and compassionate.
Their vision is equally good under water.
Dolphins never sleep. One half of their brain is always awake, and after two hours the activity switches to the other half.
Dolphins are the only animal species that develops a natural form of type 2 diabetes.
Males collect algae, from which they make a bouquet of flowers and bring it to their beloved female.
Dolphins have the ability to recognize, remember and solve problems, making them one of the most intelligent creatures on the planet.
Illustrative Photo by Pixabay: https://www.pexels.com/photo/cute-dolphine-underwater-64219/