Thick brittle star
Ophiarachna incrassata
InvertebrateMarine
This brittle star has a large central disc and five thick, spiny arms. Its coloration ranges from olive green to dark brown, sometimes with patterns. It is nocturnal and hides in crevices during the day. It is an opportunistic predator that captures small fish and invertebrates. Its arms are fragile and can regenerate. It can reach 20 cm in diameter.
Recommended parameters
| Parameter | Recommended range |
|---|---|
| Temperature | 24–28 |
| pH | 8.1–8.4 |
| GH | 8–12 |
| KH | 8–12 |
| Salinity | 1.023–1.025 |
| NO₃ | ≤ 20 |
| PO₄ | ≤ 0.1 |
Care
Difficulty3/5
Dietcarnivore
Min. tank100 L
Min. group1
Adult size20 cm
Lifespan5 ans
Temperamentsemi-aggressive
Care notes
Maintain temperature 24-28°C, pH 8.1-8.4, salinity 1.023-1.025. A minimum tank size of 100 liters is required. Diet should include pieces of fish, shrimp, or mussels. Avoid keeping with very small fish as it may eat them. Low lighting and moderate flow are suitable. Sandy substrate and rocks for hiding are important. Captive breeding is rare.