Invertebrate:
Long-spined sea urchin
Diadema setosum
Marine
Adult diameter7.6–30.5 cm
Tank200 L or more
Care levelBeginner, intermediate
Will it fit your tank?
Compare it with your tank's species, size, water tests and country.
Water
Temperature23–27.8 °C
5 °C35 °C
pH7.8–8.4
49
Salinity30.5–34.5 ppt
0 ppt40 ppt
- Comfortable
- Acceptable, less ideal
- Tolerated, not comfortable
Space
Tank volume200 L
- The space it needs, from the least to the most generous
- Recommended
Character and care
- TemperamentPeaceful
- DietHerbivore
- Reef safeYes
Legal rules
The least the law allows, by country: the water and space above are what the species needs. A tank is checked against its own country's rules.
Austria
2 rules
- Nitrite: up to 0.05 mg/L NO₂
- Nitrate: up to 5 mg/L NO₃