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Brittle Sea Star, Knobby Fancy
Please Note: Due to variations within species, your item may not look identical to the image provided. Approximate size range may also vary between individual specimen.
Brittle Sea Star, Knobby Fancy (Ophiomastix annulosa)
Additional locales and sizes may be available!

Quick Stats

Care Level Moderate
Temperament Semi-aggressive
Color Form Black, Red
Diet Carnivore
Reef Compatible Yes
Water Conditions 72-78° F, dKH 8-12, pH 8.1-8.4, sg 1.023-1.025
Max. Size 10"
Origin Indonesia
Family Ophiotrichidae
Supplements Trace Elements
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The Knobby Fancy Brittle Sea Star, or Chain-Link Brittle Star, has a very small red central disc which may have variable patterns. The long, elegant arms are fringed with fancy paddle-shaped spines and among shorter sharp spines.

It is nocturnal and often hides under rocks during the day. At night, it comes out to eat detritus and small organisms. Avoid housing with slow, small, sluggish fish.

The Knobby Fancy Brittle Sea Star is very intolerant of sudden changes in oxygen levels, salinity and pH of the water, and cannot tolerate copper-based medications. The drip acclimation method is highly recommended for all Sea Stars due to their intolerability to changes in water chemistry. It should never be exposed to air while handling.

Ophiomastix annulosa is reported to possess toxic mucus capable of paralysis and fatality in small animals. Always use caution when handling, and avoid any contact with eyes or mouth.

In the aquarium it may be fed zooplankton, very finely chopped meaty items, and liquid invertebrate foods.

Approximate Purchase Size: 3" to 6"

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