Black Sailfin Blenny
Atrosalarias fuscus
What you need to keep a Black Sailfin Blenny
Shop all
Seachem Reef Carbonate
From R161Sizes
Seachem Ammonia Alert
R267
Seachem Reef Iron
From R162Sizes
Seachem Reef Phosphorus
From R162Sizes
pH
8.1–8.4
Temperature
24–27 °C
Max size
14 cm
Min tank
150 L
Where to buy
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Overview
What to know before you buy.
A dark-bodied grazing blenny, often with a warm flush toward the tail. Like other Salarias-type blennies it needs an established algae supply to thrive.
Care guide
Keeping Black Sailfin Blenny healthy in a South African setup.
Tank setup
A minimum 150L aquarium suits Black Sailfin Blenny. Use robust décor and sight breaks so each fish can hold its own space.
Water parameters
Keep pH 8.1–8.4 and 24–27°C. Stable parameters matter more than chasing perfect numbers; acclimate new arrivals slowly.
Feeding
Herbivore — film algae, nori. Feed small amounts it clears in a couple of minutes, and vary the diet.
Behaviour
Peaceful; territorial with other blennies. Watch it at feeding time and at lights-out to see its real temperament in your tank.
Tankmates
Choose robust tankmates of similar size, and nothing small enough to be eaten. Add Black Sailfin Blenny last so territories reset.
Breeding
Breeding success with Black Sailfin Blenny depends on the line and water chemistry; ask your shop about proven pairs.
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Market intelligence
Price trends and buyer demand — data only FishHub tracks.
Price tracking started 25 Aug 2026 — chart builds as listings are updated
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