What is its maximum size?
The body can grow to approximately 8–10 cm in diameter, while its long, thin spines can extend the overall size to 30–40 cm or more.
Where is its origin and where is it exported from?
The Long spine Black Urchin originates from the Indo-Pacific, including the Red Sea, East Africa, Indonesia, the Philippines, Australia and the western Pacific. It is collected and exported for the aquarium trade from parts of its native range, including Indonesia and the Philippines.
Is it reef compatible?
Yes, with caution. It is generally reef safe and feeds mainly on algae, helping to control algae growth. However, it may consume desirable coralline algae and can knock over loose coral frags or unsecured rockwork as it moves around the aquarium.
What should I feed it?
Feed a diet consisting mainly of marine algae and seaweed, including nori and other suitable algae-based foods. It will also graze naturally on algae growing on live rock and aquarium surfaces. Supplement its diet if natural algae growth is insufficient.
How many can I keep?
Best kept singly in most home aquariums. Multiple individuals may be possible in very large aquariums with sufficient grazing area and food, but space and food availability should be considered carefully.
How compatible is it with other fish?
Generally peaceful and compatible with many reef fish and invertebrates. However, certain fish, including triggerfish and some large wrasses, may prey on sea urchins. Its long spines can injure fish that attempt to attack it.
Water parameters
-
Temperature: 24–28°C
-
pH: 8.1–8.4
-
Specific gravity (salinity): 1.023–1.025
-
Ammonia and nitrite: 0 ppm
-
Nitrate: Keep as low as practical through good filtration and regular water changes.
-
Calcium and alkalinity: Maintain stable reef-appropriate levels to support healthy skeletal growth.