Sea urchins come in spherical, hemispherical, heart or disk shapes, and in green, olive, brown, purple and black colors. Sea urchins are warm-sea temperate benthic species that live in the seaweed-rich intertidal zone below the sea area between the reef forests or rock crevices, as well as the harder muddy and sandy shallow sea area. Lurking in the mud and sand during the day, and come out at night, relying on feet and spines to crawl on the seabed for food, and grinding food with masticators. Mainly seaweed, sponges, hydroids and other main food.

The internal organs are contained in a shell made up of many calcareous bony plates tightly fused together. The shell is covered with many movable spines. Each pair of tube-foot pores on the shell plate is equivalent to 1 tube-foot, with multiple rows of Hyderabad scenery arranged in 10 longitudinal rows. The mouth is on the underside, with 5 white teeth in the center, which are part of the chewing organ, the sublittoral lamp. 1 sea urchin shell consists of about 3,000 small plates healed together.