| Care Level | Expert |
|---|---|
| Temperament | Peaceful |
| Reef Safe | Yes |
| Functional Benefit | Ornamental Only |
| Diet Type | Planktivore |
| Mininum Tank Size | 10 gallons |
| Max Size | 2 inches |
| Temperature | 72–78°F |
| pH Range | 8.1–8.4 |
| Specific Gravity | 1.022–1.025 |
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Every order ships with our standard 3-hour live arrival guarantee. Need more time? Add our 5-Day Guarantee at checkout.
Full guarantee terms →Ships Monday – Thursday for next-day arrival at your nearest FedEx Hold location — typically ready by 9 AM. We monitor every delivery.
Shipping details →
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.
The Mini Dart Goby (Aioliops megastigma) is a true “micro” dartfish-type goby that stays small and slender, making it a natural fit for pico and nano reef displays. It’s typically seen hovering in open water in a tight little group, adding constant, subtle movement without bothering corals.
What You’ll Observe:
- Midwater hovering with quick, short “dart” movements between pauses
- Small groups staying close together and moving as a loose shoal
- Frequent, rapid feeding responses to tiny foods drifting in the water column
- A characteristic “head-up” swimming posture that shows up often in calm-to-moderate flow
To do well with this species, provide a calm, established nano reef with plenty of hiding spaces and gentle open-water lanes to hover in. Offer very small planktonic foods (live copepods, baby brine, and/or fine frozen plankton substitutes) in multiple small feedings spread through the day.
Do they do better singly, in pairs, or in a group?
Most keepers pursue them specifically for group behavior; small groups are commonly discussed as the “point” of keeping this fish, since they tend to hover together.
Will they accept frozen foods, or do they stay live-food only?
Reports are mixed: some hobbyists see them take very small frozen items (like cyclops or baby brine), while others rely primarily on live foods for consistent feeding response.
How often should I expect to feed them once they’re settled in?
Because they’re tiny planktivores, hobbyists often describe success with several small feedings daily rather than one large feeding.
What should I look for to confirm they’re getting enough food?
Keepers commonly watch for a gently rounded belly after feeding and steady, alert hovering behavior in the group as practical day-to-day indicators.
What’s a realistic expectation for long-term longevity in aquariums?
Discussion threads often mention limited long-term track records, with some reports suggesting they may not commonly be documented past about a year in typical hobby systems.
Shipped with pure oxygen and temperature control so it arrives stress-free and ready to eat.

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