Genus
Common name: Purple Sea Urchin
Scientific name: Sphaerechinus
Sphaerechinus is a genus of sea urchins in the family Toxopneustidae, commonly known as the Purple Sea Urchin. These urchins are characterized by their large size and striking purple coloration. They are popular in the reefkeeping hobby for their algae-eating habits, helping to control algae growth in the aquarium. Sphaerechinus species are generally hardy and can adapt to a range of water conditions, but they require ample space to roam and a steady supply of algae or seaweed-based foods. They are also known for their interesting behavior and are often observed rearranging substrate and decorations.