Common name: Coral Catshark

General Information

The Coral Catshark, scientifically known as Atelomycterus marmoratus, is a small, bottom-dwelling shark species found in the warm coastal waters of the Indo-Pacific region. This species is particularly popular among aquarists who have the capacity to maintain large marine tanks, due to its manageable size and striking appearance. Its body is adorned with a marbled pattern of dark spots and bands against a lighter background, making it an attractive addition to large home aquariums.

In the wild, Coral Catsharks are found in coral reefs and sandy bottoms, often hiding in crevices or under ledges during the day and becoming more active at night. They play a role in controlling populations of small invertebrates and fish, thus maintaining the ecological balance of their natural habitats.

Care

Caring for a Coral Catshark requires a significant commitment in terms of space and resources. They need a large aquarium with ample swimming space and hiding spots created with live rock and other structures. The tank should mimic their natural environment, with stable water conditions and minimal light to accommodate their nocturnal nature.

Coral Catsharks are sensitive to poor water quality, so maintaining excellent filtration and regular water changes is crucial. Their tank should be equipped with a secure lid, as they are known to be quite active and may jump.

Diet and Feeding

In their natural habitat, Coral Catsharks are carnivorous, feeding on small fish, crustaceans, and mollusks. In captivity, they should be offered a varied diet of fresh or frozen seafood such as shrimp, squid, and fish fillets. It is important to ensure the food is appropriately sized to prevent choking.

Feed them two to three times a week, offering enough food to satisfy their hunger but avoiding overfeeding, which can lead to water quality issues. Coral Catsharks are nocturnal feeders, so offering food during the evening or night aligns with their natural feeding habits.

Behavior and Compatibility

Coral Catsharks are generally peaceful and solitary creatures. They are best kept alone or with other non-aggressive species that inhabit different levels of the tank. Their nocturnal nature means they are most active at night, and they prefer to rest in hidden spots during the day.

While they are not known to be aggressive, they may prey on smaller fish and invertebrates if given the opportunity. Therefore, they are not considered reef-safe and should be housed with caution in community tanks.

Reproduction

Breeding Coral Catsharks in captivity can be challenging due to their specific environmental and dietary needs. They are oviparous, meaning they lay eggs, which are often referred to as "mermaid's purses." Providing optimal conditions and a stress-free environment is crucial for successful breeding.

While breeding in captivity is difficult, there are ongoing efforts by aquarists and researchers to improve captive breeding methods for Coral Catsharks. These efforts include refining tank conditions, optimizing diet, and reducing stress to encourage successful egg laying and hatching. Successful captive breeding programs are important to reduce the reliance on wild-caught specimens and to support the conservation of this species.

Health and Common Issues

Coral Catsharks can live for over 20 years in captivity if provided with proper care. They are generally hardy but can be susceptible to stress-related illnesses if water quality is poor or if they are housed in inadequate conditions.

When selecting a Coral Catshark, look for clear eyes, intact fins, and a healthy appetite. Regular health checks and maintaining optimal water conditions can prevent most common health issues.

Habitat

The natural habitat of the Coral Catshark includes shallow coral reefs and sandy bottoms across the Indo-Pacific region, particularly in areas like the waters off Thailand, Indonesia, and northern Australia. They thrive in warm, tropical environments with plenty of hiding spots and a stable food supply.

Conservation Status

The Coral Catshark is listed as "Near Threatened" on the IUCN Red List, primarily due to increasing pressures from habitat degradation and overfishing. The destruction of coral reef habitats and unregulated fishing practices have contributed to a decline in their populations. To help protect this species, it is essential for hobbyists to source Coral Catsharks from reputable breeders who adhere to sustainable practices, ensuring minimal impact on wild populations.