Black Vent Damsel
Dischistodus melanotus
| Stock | Variations | Price | Quantity |
|---|
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Monday – Friday 8 AM – 9 PM
Saturday 12 PM – 4 PM
Sunday 12 PM – 9 PM
Healthy, stable animals from vetted suppliers — inspected before packing, shipped overnight. Decades of experience built this model so we can deliver premium livestock at 30%+ less than you'd pay elsewhere.
| Care Level | Easy |
|---|---|
| Temperament | Semi-Aggressive |
| Reef Safe | Yes |
| Functional Benefit | Ornamental Only |
| Diet Type | Omnivore |
| Mininum Tank Size | 55 gallons |
| Max Size | 5 inches |
| Temperature | 72–78°F |
| pH Range | 8.1–8.4 |
| Specific Gravity | 1.022–1.025 |
The Black Vent Damsel (Dischistodus melanotus) is a reef tank damselfish recognized for its bold, high-contrast pattern and dark “vent” area, with a natural range in the Western Pacific.
What You’ll Observe:
- Picks a favorite section of rockwork and patrols it in short, fast loops
- Spends most of the day hovering close to structure, then dashing out for food
- Learns the daily routine quickly and is often one of the first fish visible at feeding time
- Regular “posturing” and quick display swims near its chosen hiding spot
To do well long-term, provide stable rockwork with multiple crevices so it can claim a home base without dominating the entire aquascape. Offer a mixed menu (meaty frozen foods plus algae-based flakes/pellets) and spread feedings across the tank so tankmates can eat comfortably. Adding this fish after more peaceful species are already established often helps the whole community settle into a predictable routine.
How can I help reduce “territory guarding” around one specific rock or cave?
Reef keepers often get better results by adding a second suitable hide and slightly re-spacing a few rocks so the fish re-maps its route instead of fixating on one choke point.
Can I keep two Black Vent Damsels together?
Pairs are sometimes attempted, but hobbyists frequently report persistent nipping when a second damsel is introduced into an already-claimed space.
Will it bother calmer fish that prefer open water, like firefish-style tankmates?
Many hobbyists notice calmer fish stay tucked in when a damsel becomes “on patrol,” so extra caves and clear swim lanes help everyone keep their preferred spacing.
If it ever needs to be removed, what’s the least disruptive way to catch it?
A number of reef keepers rely on a fish trap (baited and left in place) so the fish enters on its own schedule without tearing up the aquascape.
Does damsel aggression usually fade over time, or stay consistent?
Threads commonly describe a pattern where behavior is calm at first, then becomes more assertive as the fish “settles in” and starts treating a section of the tank like a home base.
Each fish is checked for strong appetite and activity before we approve it for your tank.
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