Goby-Knight

All our fish, shrimp and corals are bagged with fresh oxygen as well as a heat pack in winter.

When ordering livestock please select the box size and add it to your cart for accurate overnight (1-2 days) shipping costs. A small box can take 1-2 bags and a medium box 6 bags. One bag fits max 10 small (1-3cm) fish or max 2 medium (3-5cm) fish or max 1 large (>5cm) fish.

ONE SPECIES PER BAG. Eg: One bag of 10 neon tetra.

Description

The Knight Goby, also known as the Knight Sleeper Goby, is a hardy and attractive species native to freshwater and brackish waters of Southeast Asia (India, Bangladesh, and surrounding regions). With a slender, elongated body and silvery-gray base color, it’s adorned with distinctive dark blotches and a subtle iridescent shimmer. Males often display more intense coloration and develop extended dorsal fins.

• Scientific name: Stigmatogobius sadanundio

• Common names: Knight Goby, Knight Sleeper Goby

• Adult size: 8–10 cm (3–4 inches)

• Lifespan: 3–5 years

• Temperament: Semi-aggressive (especially with smaller fish or conspecifics)

Tank Requirements

• Tank size: Minimum 60 liters (ideally larger for a group)

• Water type: Brackish preferred, though can adapt to freshwater temporarily

• Salinity: 1.005–1.010 SG for optimal health

• pH: 7.0–8.5

• Temperature: 22–28°C (72–82°F)

• Substrate: Sandy or fine gravel (they enjoy digging)

• Décor: Provide rocks, caves, driftwood for hiding, and plenty of open swimming space

Diet

Knight Gobies are carnivorous and thrive on a protein-rich diet. They often ignore dry food at first but can adapt.

• Ideal foods: Frozen bloodworms, brine shrimp, chopped seafood, tubifex worms, live or frozen daphnia

• Optional: High-quality sinking carnivore pellets (with acclimation)

Tank Mates

• Best kept with brackish-compatible species of similar size and temperament (e.g., mollies, archerfish, bumblebee gobies)

• Avoid small fish or shrimp, as Knight Gobies may eat them

• Can be territorial with their own kind unless in a spacious tank with hiding spots

Care Notes

• Water quality is key – they’re sensitive to poor conditions

• Not ideal for planted tanks, especially in brackish setups

• Prefer low-flow areas and subdued lighting

• Secure the lid – gobies may jump when startled