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Interesting name, but poisonous species.

Scientific name	Atergatis floridus
English name	---
Japanese name	滑々饅頭蟹
Classification	Malacostraca
Classification details	Decapoda Xanthidae
Full length	about 5cm.
Distribution	Pacific to Indian Ocean. Distributed along the Pacific coast of Japan.

Characteristics

It has a cute round silhouette and an interesting name, but it is a poisonous species. can't eat.

White spots are symmetrically arranged on a brown background. There are yellow stripes around the eyes and on the edge of the shell. The iris is reddish brown. Scissors are powerful.

Ecology

Distributed from rocks to shallow seabeds. It eats seaweed and small aquatic animals. It is sometimes seen on the island. It has poison in its body derived from its food.

Habitat

Miura Peninsula Arasaki

I found it sitting still among the sea urchins on the shore of Arasaki. I was able to easily photograph it, even though it moved slowly along the rocky shore. The carapace pattern was distinctive.