Bundoon blenny

Geographical Origin and Habitat: Meiacanthus bundoon is native to the southwestern Pacific Ocean, with populations primarily concentrated around Fiji, Tonga, and the Solomon Islands. It inhabits seaward coral reefs and shallow lagoon systems, typically ranging in depth from 2 to 20 meters. It is frequently found swimming near branching Acropora corals, which it uses as immediate shelter when threatened by predators.

Taxonomy and Morphology: Belongs to the family Blenniidae, subfamily Blenniinae, and tribe Nemophini (fangblennies). It features an elongated and slightly compressed body, characteristic of the genus. Adults reach a maximum length of about 8 centimeters. It possesses two long, hollow canine teeth in the lower jaw connected to venom glands, used defensively to escape predators.

Social Behavior: Unlike many benthic blennies, this species is an active open-water swimmer that spends substantial time in the water column. It is generally peaceful toward other species but can exhibit territorial aggression toward conspecifics of the same sex or similarly shaped species, particularly in smaller aquariums.

Coloration and Sexual Dimorphism: Displays a dramatic and contrasting color pattern: the body is mostly dark grey to velvet black, while the dorsal fin features a bright yellow-orange coloration that tapers toward the back. Some regional variations display greenish hues on the head. Sexual dimorphism is minimal; mature males may develop slightly longer dorsal and anal fin filaments.

Aquarium Setup: Requires a reef aquarium of at least 100 liters. It is essential to provide plenty of live rock with numerous caves, crevices, and small holes where the fish can establish a nocturnal roost. Ample open swimming space is necessary. A tight-fitting lid or mesh cover is recommended as they are capable of jumping when startled.

Diet and Feeding: An omnivore with a preference for small crustaceans and zooplankton. In captivity, it readily accepts frozen foods such as mysis, brine shrimp, copepods, and preparations containing marine algae. It quickly adapts to high-quality dry flakes and micro-pellets. Feed twice daily to support its active swimming habits.

Water Quality: Requires stable reef parameters: water temperature between 24 and 28 °C, pH levels of 8.1 to 8.4, and a specific gravity of 1.020 to 1.025. Keep nitrates and phosphates low through active protein skimming and regular water changes of 10-15% every two weeks to prevent health complications.

Compatibility and Cohabitation: An excellent community fish. Natural predators usually avoid it due to its venomous bite. Avoid keeping it with other Meiacanthus species unless the tank is large with distinct visual boundaries. It is fully reef-safe and will not harm corals or most ornamental invertebrates.

Aquarium Breeding: Breeding in captivity is possible. They are substrate spawners; the female deposits adhesive eggs inside a crevice or empty tube, which the male then guards and fans until hatching. The newly hatched larvae are very small and require microscopic live foods such as rotifers to survive.

Risks and Diseases: A robust species that rarely falls ill under proper water conditions. However, avoid or carefully dose copper-based medications, as blennies can be highly sensitive to them. Use caution when handling or cleaning the tank: its bite is venomous, causing pain similar to a bee sting in humans.