Care guide, husbandry, breeding, disease, sourcing, and tankmate intelligence on Mini Brittle Star - written by the Fast Aquatics editorial team and cross-verified against vendor records on the live marketplace.
Mini Brittle Star (Ophiothrix sp.) is a marine invertebrate kept by aquarists for reef-tank cleanup, biological control of pests, or aesthetic display. Hardy and forgiving of typical beginner mistakes when given proper water chemistry.
Where Mini Brittle Star comes from
Mini Brittle Star (Ophiothrix sp.) is native to Indo-Pacific reef ecosystems, with wild populations distributed across coral reefs, sandy lagoons, and rocky tide pools. Captive specimens are typically wild-collected; some species are starting to be aquacultured but most Mini Brittle Star sold today still comes from wild reef collection. Sustainable sourcing matters - look for vendors who can verify their collection practices, and consider aquacultured alternatives when available.
Mini Brittle Star tank size and setup
Mini Brittle Star requires a minimum of 10 gallons for healthy adults. The minimum is based on the species' adult size (2 inches (arm)), territorial range, and behavior pattern. Most Mini Brittle Star sold at small juvenile size will reach full adult size within 12-24 months and the system must be sized to the adult, not the juvenile.
For a Mini Brittle Star setup: mature reef tank with stable parameters, live rock for cover, sandbed substrate (1-2"), reef-grade lighting if photosynthetic, and a fully-cycled biological filter at least 6 weeks old. Newly-cycled tanks under 6 weeks crash the parameters that Mini Brittle Star depends on.
Mini Brittle Star requires standard reef parameters held tightly stable: Temperature: 76-80°F (24-27°C) Specific gravity: 1.025 (refractometer-measured) pH: 8.1-8.4 Alkalinity: 8-9 dKH Calcium: 420-450 ppm Magnesium: 1300-1400 ppm Ammonia + nitrite: Both 0 ppm Nitrate: Under 10 ppm Copper: 0 (lethal to invertebrates)
Mini Brittle Star is sensitive to copper - never medicate the display tank with copper if Mini Brittle Star is present. Stable parameters beat perfect parameters.
What Mini Brittle Star eats
Mini Brittle Star is a detritivore. Eats uneaten food, fish waste, and biofilm. Generally finds enough food in a stocked tank without supplemental feeding. If population thins, drop in algae wafers or sinking pellets weekly. Feed Mini Brittle Star appropriately for its size + activity level. Overfeeding is the #1 cause of water-quality crashes in tanks of all sizes.
Mini Brittle Star tankmates and compatibility
Mini Brittle Star is generally peaceful and compatible with most reef community species. Avoid keeping with predatory fish that view inverts as food: large wrasses (especially halichoeres + thalassoma), triggerfish, pufferfish, and certain large angelfish. Multiple Mini Brittle Star can share a tank but compete for food.
Browse care guides for tankmate-compatibility tables for Mini Brittle Star and similar species.
Mini Brittle Star adult size and lifespan
Mini Brittle Star reaches 2 inches (arm) at adulthood with a captive lifespan of 3-6 years with proper care. Many marine inverts molt periodically; provide adequate calcium and a stable parameter regime to support healthy molts.
Can you breed Mini Brittle Star?
Mini Brittle Star breeding in captivity ranges from straightforward (some shrimp, snails) to nearly impossible (most starfish, urchins) due to pelagic larval requirements. Captive-bred specimens are increasingly available from sustainable aquaculture facilities; check with vendors before assuming wild-caught origin.
Common Mini Brittle Star diseases and problems
Mini Brittle Star is sensitive to copper, ammonia spikes, low oxygen, and rapid parameter swings. NEVER use copper medications in a tank with Mini Brittle Star. Symptoms of stress: reclusive behavior, color loss, refusal to feed, abnormal molting (incomplete or stuck molts). Most Mini Brittle Star deaths trace back to acclimation shock or parameter mismatch - drip-acclimate over 45-60 minutes when adding to a new tank.
Where to buy Mini Brittle Star online
Mini Brittle Star is sold at LFS (local fish stores), online retailers, and direct from breeders/wholesalers. Pricing varies widely by source, size, and quality:
Browse live Mini Brittle Star from vetted Fast Aquatics vendors with carrier-tracked overnight shipping (FedEx Priority + UPS Next Day), climate-aware hold logic, and a 4-hour DOA window with photo-evidence claims. Captive-bred or aquacultured specimens cost more upfront but arrive healthier and integrate faster.
Mini Brittle Star FAQ
How big does Mini Brittle Star get?
2 inches (arm) at adulthood within 12-24 months.
How long does Mini Brittle Star live?
3-6 years with proper care.
What is the minimum tank/pond size?
10 gallons, with larger systems strongly recommended.
Is Mini Brittle Star hard to keep?
Mini Brittle Star is rated beginner difficulty.
What does Mini Brittle Star eat?
Mini Brittle Star is a detritivore; appropriate diet matches its natural feeding pattern.
Mini Brittle Star taxonomy and care recommendations cross-checked against the following authoritative references and our internal vendor + breeder database.