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Knight Goby
Stigmatogobius sadanundio
📍 Southeast Asia
The Knight Goby is a small, peaceful freshwater goby native to Southeast Asia, known for its subtle coloration and bottom-dwelling behavior. These hardy fish are excellent for beginners and community tanks, displaying interesting foraging behavior as they sift through substrate. They are relatively undemanding and adapt well to a variety of tank conditions.
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Care Guide
Diet
Knight Gobies are omnivorous bottom feeders that thrive on a varied diet of small live foods, frozen foods like bloodworms and brine shrimp, and quality sinking pellets. Feed small portions once or twice daily, ensuring food reaches the substrate where they forage. They will also consume algae wafers and vegetable matter.
Behavior
Knight Gobies are sedentary bottom-dwellers that spend most of their time sifting through substrate in search of food, displaying natural foraging behavior. They are peaceful and non-aggressive, making them ideal for community tanks, though they may be territorial with other bottom-feeders in very small spaces. They are most active during dawn and dusk hours.
Breeding
Breeding Knight Gobies in captivity is moderately difficult and rarely achieved in home aquariums. They require specific conditions including caves or PVC pipes for spawning sites, slightly acidic water, and careful monitoring. Males are territorial during breeding and will guard eggs, but fry are difficult to raise due to their small size and specific dietary needs.
Tank Mates
Small, peaceful fish that occupy different water zones
Similar bottom-dwelling behavior but may compete for food in small tanks
Peaceful mid-water dweller with no territorial conflicts
Peaceful invertebrate that shares bottom space without aggression
Small, peaceful schooling fish that occupy upper water zones
Peaceful detritivore that shares substrate without conflict
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, rapid breathing, rubbing against objects, lethargy
Increase water temperature to 28-30 C (82-86 F), perform daily water changes, use aquarium salt or commercial ich treatment, ensure good filtration and aeration
Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy, loss of appetite
Perform frequent water changes to improve water quality, treat with antibacterial medication, remove any sharp decorations, ensure adequate filtration
Bacterial Infection
Open sores, cloudy eyes, swollen body, loss of appetite, erratic swimming
Isolate affected fish in quarantine tank, treat with broad-spectrum antibiotic medication, maintain pristine water conditions with daily changes
Parasitic Infection
Excessive scratching, weight loss, visible parasites on skin, clamped fins, lethargy
Treat with anti-parasitic medication, increase water temperature slightly, perform frequent water changes, quarantine if necessary
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Quick Facts
- diet
- omnivore - small invertebrates, algae wafers, and quality sinking pellets
- lifespan
- 4-6 years
- max size
- 9 cm (3.5 in)
- tank size
- 20 gallons minimum
- temperament
- peaceful
Water it likes
- ph
- 6.5-7.5
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 5-12 dGH
- temperature
- 72–79°F (22–26°C)