The Smith’s Blenny (Meiacanthus smithi), also known as the Disco Blenny or Smith’s Fangblenny, is a captivating marine fish recognized for its distinctive appearance and peaceful demeanor. Native to the eastern Indian Ocean, particularly around northern Sri Lanka and the western Java Sea, this species is a favoured choice among aquarists due to its hardiness and engaging behaviour.
• Small fish safe: ✅ Yes
• Small invert safe: ✅ Yes
• Coral safe: ✅ Yes
• Minimum tank size: 38 liters (10 gallons)
• Adult size: Up to 8.5 cm (3.3 inches)
• Diet: Omnivorous, with a preference for zooplankton
• Be aware of: Possesses venomous fangs used for defense; requires ample hiding spots; known to jump, so a secure lid is essential.
Appearance and Coloration
Smith’s Blenny exhibits a sleek, elongated body predominantly white in color, accented by a prominent black stripe running along the base of the dorsal fin. This striking contrast enhances its visual appeal, making it a standout addition to marine aquariums. The species reaches a maximum length of approximately 8.5 cm (3.3 inches).
Natural Habitat and Behaviour
In their natural environment, Smith’s Blennies inhabit coral reefs up to depths of 20 meters. They are known for their active and inquisitive nature, often seen swimming openly in search of food. Despite possessing venomous fangs for defense, they are generally peaceful and coexist well with other non-aggressive species.
Tank Requirements and Water Parameters
To ensure the well-being of Smith’s Blenny in captivity:
• Minimum Tank Size: A 10-gallon (38 liters) aquarium is suitable, though larger tanks provide more space for exploration.
• Water Parameters:
• Temperature: 24°C – 27°C (75°F – 80°F)
• pH: 8.1 – 8.4
• Specific Gravity: 1.020 – 1.025
• Aquascaping: Incorporate ample live rock to create hiding spots and territories, mimicking their natural reef environment. Ensure there is open space for swimming.
• Lighting: Moderate lighting is sufficient, aligning with typical reef setups.
• Water Movement: Moderate flow replicates their natural habitat and supports their active swimming behavior.
• Tank Cover: A secure lid is essential, as Smith’s Blennies are known to jump, especially when startled.
Diet and Feeding
Smith’s Blennies are omnivores with a preference for zooplankton:
• Natural Diet: In the wild, they primarily feed on zooplankton.
• Captive Diet: Offer a varied diet that includes:
• Mysis shrimp
• Brine shrimp
• High-quality flake and pellet foods
• Occasional vegetable matter, such as spirulina or marine algae
Feeding small amounts 2-3 times daily is recommended to accommodate their high metabolism.
Compatibility and Social Structure
Smith’s Blenny is generally peaceful and suitable for community tanks:
• Territoriality: While they possess venomous fangs for defense, they rarely exhibit aggression towards other species. However, caution is advised when housing with similar-looking blennies to prevent potential territorial disputes.
• Tank Mates: Compatible with a variety of peaceful fish and invertebrates. Avoid housing with large, aggressive species that may intimidate or prey upon them.
• Reef Compatibility: Considered reef-safe, they do not harm corals or sessile invertebrates.
Important Considerations
• Venomous Fangs: While primarily used for defence, exercise caution during tank maintenance to avoid potential bites.
• Tank Maturity: Introduce them to well-established aquariums with stable water parameters to ensure health and longevity.
• Health Monitoring: Regular observation is necessary to ensure they are receiving adequate nutrition and to detect any signs of stress or disease early.