Bald-patch Urchin

Overview

The Bald-patch Urchin (Microcyphus rousseaui) is a small, regular sea urchin recognized by its distinctive, alternating color pattern. It is primarily found in the tropical waters of the western Indian Ocean, including the Red Sea and along the East African coast.

Distribution & habitat

This species is distributed throughout the western Indian Ocean, ranging from the Red Sea southwards to Mozambique and parts of South Africa. It typically inhabits reef environments, where it is often found in rock and rubble areas covered in algae, as well as in seagrass beds.

Appearance

This urchin has a small, hemispherical test (shell) that is generally light brown. Its most notable feature is the presence of five distinct, naked zones that form a zigzag pattern across the body, which are devoid of spines. The spines themselves are relatively short, uniform in size, and typically reddish-brown with white tips. The naked areas of the test are often a reddish or purplish hue, becoming lighter toward the center.

Biology & behavior

Microcyphus rousseaui is a nocturnal species that is not highly mobile. It is primarily a detritivore, feeding on organic refuse and algae found within its environment. While it can be consumed by humans, it holds no significant culinary value.