Ophiomastix annulosa

Datasheet

General Description

The Brittle Sea Star, also known as the Knobby Fancy Sea Star or Chain-Link Brittle Star, features a small red central disc with variable patterns. Its long arms are adorned with elegant paddle-shaped spines and shorter sharp spines. This species is nocturnal, typically hiding under rocks during the day and emerging at night to feed on detritus and small organisms. It is important to note that Brittle Sea Stars should not be housed with slow or small fish due to their active nature.

Aquarium Suitability

Moderate care is required when keeping the Brittle Sea Star in an aquarium. This species is sensitive to abrupt changes in oxygen levels, salinity, and pH, making drip acclimation crucial to their well-being. It is vital to avoid exposing the Brittle Sea Star to air during handling. Ophiomastix annulosa is known to produce toxic mucus that can be harmful, so caution must be exercised when handling this species.

Demands, Care, and Hardiness

As a carnivorous species, the Brittle Sea Star should be fed a diet of zooplankton, finely chopped meaty items, and liquid invertebrate foods in the aquarium. Maintaining stable water parameters within the recommended ranges of a pH of 8.1-8.4, a specific gravity of 1.023-1.025, and a carbonate hardness (KH) of 8-12 dKH is essential for their well-being. Supplementing their diet with trace elements can also be beneficial.

Reef Suitability

Reef compatibility is a positive trait of the Brittle Sea Star, making it a suitable addition to reef aquariums. Its semi-aggressive temperament is generally well-tolerated by other reef inhabitants.

Aquarium Setup

When setting up an aquarium for the Brittle Sea Star, providing plenty of hiding spots, such as rocks and caves, is essential to mimic its natural habitat. Ensuring a sandy substrate will allow the sea star to move comfortably across the tank bottom. Maintaining stable water quality and avoiding copper-based medications is crucial for the health of this species.

Behaviour

The Brittle Sea Star is known for its nocturnal behavior, becoming more active during the night when it ventures out to scavenge for food. Due to its semi-aggressive nature, it should not be kept with slow or small fish that may become targets of its feeding behavior.

Feeding and Diet

Feeding the Brittle Sea Star a varied diet consisting of zooplankton, finely chopped meaty items, and liquid invertebrate foods is essential for its nutritional needs. Care should be taken to ensure that it receives an adequate amount of food to support its health and well-being.

Dimorphism

Dimorphism and captive reproduction information regarding the Brittle Sea Star Ophiomastix annulosa are not covered in the available data.

Habitat and Distribution

The Brittle Sea Star is found in various tropical marine habitats, often dwelling among rocks and corals in reef environments. Its distribution ranges across suitable marine habitats where it can scavenge for food and hide in crevices for protection.