Common name: Echinometridae

Echinometridae is a family of sea urchins commonly found in reef environments. Members of this family, such as the pencil urchin and the banded sea urchin, are known for their robust spines and play a role in grazing algae, which helps prevent overgrowth on the reef. They exhibit a range of colors and patterns, making them visually appealing in aquariums. However, their spines can be sharp and venomous, requiring careful handling. They are beneficial for controlling algae but may also consume coralline algae, which is often desired by reefkeepers for its aesthetic value.

1. 
   Common name: rock-boring urchin

   Scientific name: Echinometra lucunter
2. 
   Common name: Rock Boring Urchin

   Scientific name: Echinometra mathaei
3. 
   Common name: Green Urchin

   Scientific name: Echinometra viridis
4. 
   Common name: Urchin Spine Snail

   Scientific name: Echinostrephus aciculatus
5. Common name: Burrowing fine spine urchin

   Scientific name: Echinostrephus molaris
6. 
   Common name: slate pencil urchin

   Scientific name: Heterocentrotus mamillatus