Cyclocoeloma

Cyclocoeloma tuberculata is a small size spider crab, its carapace reach an average length of 45mm from the rostral area to posterior tip.

[1] The back side of the carapace is rounded but the rostral area is going relatively far ahead and looks like a head with lateral position of the eyes.

However, it's quite difficult to observe the carapace's shape on a living animal because it's covered with anemones.

The reason they cover their body is to camouflage themselves from potential predators, especially during the day; C. tuberculata fixes sea anemones of the family Discosomatidae to its carapace, and soft corals of the family Xeniidae to its legs.

[3] Cyclocoeloma tuberculata is widespread throughout the tropical waters of the central Indo-Pacific region.