Long-Spined Urchin (Diadema setosum)
Invertebrate in the family Diadematidae. Moderate care. Reef Safe with Caution.
Quick facts
Scientific nameDiadema setosum
FamilyDiadematidae
Care levelModerate
Reef safetyReef Safe with Caution
TemperamentSemi Aggressive
Adult size12 in
Minimum tank size55 gallons
Water parametersTemperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
Diet and feeding
Primarily herbivorous, grazing on algae. Supplement with macroalgae (kelp, nori) and occasional protein-rich foods like spirulina or frozen phytoplankton in mature tanks with limited natural algae.
Origin and habitat
Indo-Pacific from the Red Sea through Southeast Asia to the Hawaiian Islands and Central Pacific reefs.
Log Long-Spined Urchin in your reef tank
Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Long-Spined Urchin alongside everything else in your reef.
Related Invertebrates
Acropora Crab
Hoplophrys oatesii
Reef Safe with Caution
Arrow Crab
Stenorhynchus seticornis
Reef Safe with Caution
Blue Velvet Sea Slug
Chelidonura varians
Reef Safe with Caution
Boxing Shrimp
Stenopus hispidus
Reef Safe with Caution
Bubble Tip Anemone
Entacmaea quadricolor
Reef Safe with Caution
Candy Cane Coral Crab
Trapezia sp.
Reef Safe with Caution