The octopus has one brain in the center of its body and a small brain in each of its eight arms. By the way, there are three hearts.

Common bottlenose dolphin and Pacific white-sided dolphin are mammals, alligator snapping turtle are reptiles, and Sand tiger shark are fish.

Actually, they only grow beards when they are babies. It is a legacy of the dolphins' ancestors' life on land. It disappears when they grow up, but only the pores remain.

Penguins are flightless birds, or avifauna. They used to fly in the past, but it is thought that they evolved and stopped flying. Instead, they became good at swimming & diving.

Noboribetsu Marine Park Nixe opened on July 20, 1990.