Striped Poison-Fang Blenny (Meiacanthus grammistes) Care Guide
Meiacanthus grammistes is a venomous striped fang blenny of the western Pacific, mimicked by the blenny Petroscirtes breviceps.
Compiled by Aquairi from published sources · Published · Updated
Overview
Meiacanthus grammistes (Valenciennes, 1836) is a combtooth blenny of the family Blenniidae, commonly called the striped poison-fang blenny. According to FishBase it reaches about 11 cm in total length and occurs across the western Pacific. It has relatively large canine fangs in the lower jaw and is one of the venomous Meiacanthus species.
Taxonomy
- Family: Blenniidae
- Genus: Meiacanthus
- Scientific name: Meiacanthus grammistes (Valenciennes, 1836)
Habitat
FishBase records this species from the western Pacific, from Indochina to Papua New Guinea, north to the Ryukyu Islands and south to northwestern Australia and the Great Barrier Reef. It is a solitary inhabitant of sheltered lagoon and seaward reefs at depths of about 1 to 20 m.
Venom and mimicry
FishBase notes both a fang and a venom gland in this species. Research described on Wikipedia reports that the venom contains a neuropeptide, a lipase and an opioid peptide, and acts on opioid receptors to lower a predator's blood pressure, helping the blenny escape. FishBase records that M. grammistes is mimicked by another blenny, Petroscirtes breviceps.
Tank requirements
- Minimum tank volume: 100 L (about 26 gal)
- Temperature: 24-26 °C (75-79 °F)
- pH: 8.1-8.4
- Carbonate hardness range (record): 8-12 °dGH
- Lifespan: 3-8 years (KB record)
Compatibility
The species is peaceful toward most tankmates and protected from predators by its venomous bite. Suitable companions include clownfish, tangs, cardinalfish and wrasses, while large aggressive predators such as lionfish and triggers should be avoided.
Conservation status
IUCN Red List: Least Concern, assessed in 2009. The species is used in commercial fisheries and the aquarium trade.
Breeding the Striped Poison-Fang Blenny (Meiacanthus grammistes)
Overview
Meiacanthus grammistes (family Blenniidae) is a western Pacific fang blenny reaching about 11 cm total length, recorded from Indochina to Papua New Guinea, north to the Ryukyu Islands and south to northwestern Australia at depths of 1-20 m. It carries a venomous fang and venom gland, and the harmless blenny Petroscirtes breviceps mimics it. Its defensive venom has drawn scientific interest because it targets opioid receptors.
Sexing
FishBase describes the species as oviparous with distinct pairing, so a stable male-female pair is the unit for spawning. Although usually solitary on the reef, adults occasionally occur close together, and a compatible bonded pair is the foundation of any breeding effort.
Breeding Setup
Provide a peaceful aquarium with generous rockwork and small enclosed cavities for a nest, reflecting the sheltered lagoon and seaward reef habitats where the species lives. Maintaining the stable tropical reef parameters listed in the linked species record keeps the pair in spawning condition.
Spawning Behavior & Trigger
Spawning follows the genus pattern of distinct pairing: the female lays eggs in a protected cavity that the male fertilises and tends. This paired, cavity-based reproduction is the reason Meiacanthus fang blennies are among the more dependable marine aquaculture species.
Egg & Fry Care
Eggs are demersal and adhesive, attached to the substrate by a filamentous adhesive pad or pedestal, and larvae hatch as planktonic forms occurring in shallow coastal waters. Commercial breeders such as ORA have established captive lines of Meiacanthus fang blennies, demonstrating that these planktonic larvae can be raised to settlement with suitable larval systems and graded live foods.
Common Challenges
Larval rearing is the limiting step, requiring tiny live prey and stable, clean water during the planktonic phase. Because adults are venomous, broodstock should be handled carefully and never grasped by hand.