5. Dolphins and whales: When an individual in the dolphin group dies, the remaining ones will express their regret. They took turns touching the dead body and protect it. There are cases, the mother dolphin also tried to "carry" her child body and keeping it always floating on the water for breathing. This is similar to whales, as the story of J-35, the whale keeps her dead child for 17 days in the ocean in July 2018.
