Common name: Convict Blenny

General Information

The Convict Blenny, scientifically known as Pholidichthys anguis, is a unique species that often captures the curiosity of aquarists due to its eel-like appearance. Despite its common name, it is not a true blenny but belongs to its own family, Pholidichthyidae. This species is notable for its elongated body and distinctive coloration, which consists of a dark brown to black body with lighter spots or stripes.

In the aquarium trade, the Convict Blenny is valued for its striking appearance and interesting behavior. It is a relatively rare find, making it a prized addition for dedicated hobbyists looking to diversify their collections with something unusual. Its unique burrowing behavior and ability to adapt to different environments make it a fascinating species to observe.

Care

Caring for a Convict Blenny requires a well-thought-out aquarium setup. These fish are best kept in tanks with plenty of sandy substrate and hiding places, such as rock caves or PVC pipes, to accommodate their natural burrowing behavior. A tank of at least 200 liters is recommended to provide ample space for movement and exploration.

Maintaining stable water conditions is crucial for the health of Pholidichthys anguis. Good filtration and regular water changes are essential to keep the water quality high, as these fish can be sensitive to poor conditions.

Diet and Feeding

The Convict Blenny is a carnivorous species, feeding primarily on small fish and invertebrates in the wild. In captivity, they can be offered a diet of live or frozen foods such as shrimp, fish fillets, and squid. It is important to provide a varied diet to ensure they receive all necessary nutrients.

Feeding should occur several times a week, providing enough food to satisfy their appetite without overfeeding, which can lead to water quality issues. Observing their feeding behavior can be an enjoyable aspect of keeping this species, as they exhibit interesting hunting techniques.

Behavior and Compatibility

Pholoidichthys anguis is known for its relatively peaceful temperament, making it compatible with a variety of tank mates. However, due to its carnivorous nature, it is best housed with similarly sized or larger fish to avoid any predatory behavior.

These fish are solitary by nature and do not require the company of conspecifics. They can be territorial towards their own kind, so it is advisable to keep them singly unless a very large tank is available.

Reproduction

Breeding the Convict Blenny in captivity is extremely challenging and rarely achieved. There is limited information on their breeding habits, but in the wild, they are believed to lay eggs in burrows, with the male guarding the nest. Successful breeding would require replicating these conditions in a controlled environment.

Health and Common Issues

Convict Blennies are generally hardy but can be susceptible to common marine ailments if water quality is not maintained. Regular monitoring of water parameters and prompt treatment of any signs of disease are important to ensure their health.

When selecting a Convict Blenny, look for individuals that are active and have clear eyes and intact fins. Avoid those that appear lethargic or show signs of stress or illness, such as rapid breathing or unusual swimming patterns.

Habitat

The natural habitat of Pholidichthys anguis includes coastal areas and lagoons in the Indo-Pacific region. They are often found in sandy or muddy substrates where they can burrow for protection and hunting. Replicating these conditions in captivity with a sandy substrate and ample hiding places will help them feel secure and exhibit natural behaviors.