Genus
Common name: Sea Urchin
Scientific name: Tripneustes
Tripneustes is a genus of sea urchins commonly found in shallow tropical waters. They are known for their distinctive test (shell) covered with short spines, which can vary in color. These urchins are often referred to as 'Collector Urchins' due to their habit of collecting and carrying various objects on their bodies, which is thought to be a form of camouflage or protection from the sun. In the reef aquarium, they can serve as algae grazers, helping to control algae growth. However, care should be taken as they may also disturb small invertebrates or unsecured corals.