There is one at the tip of each of its five arms. Some starfish have more than five arms, but this is very rare.

Unlike fish that use their tail fins, seahorses swim with their dorsal fins without swinging their bodies, allowing them to move smoothly through coral reefs and seaweed. Their small movements do not attract the attention of foreign enemies.

There are five species of wild seals that can be seen in Japan: bearded seal (Erignathus barbatus), ringed seal (Pusa hispida), spotted seal (Phoca largha), Harbor seal (Phoca vitulina), and ribbon seal (Histriophoca fasciata).
In Japan, these seals can basically only be seen in Hokkaido.

It varies from habitat to habitat, but can weigh from 150 to 650 kg.

Rays have gill slits on the ventral side of their bodies, while sharks have gill slits on the side of their bodies.