Blue Fin Goby (Rhinogobius shennongensis)

The Blue Fin Goby, also known as the Shennong Goby, is a rare and stunning species of freshwater goby native to East Asia. It is highly valued for its vibrant colors, small size, and unique behavior, making it a favorite among specialized aquarists.

General Description

• Size: Grows up to 2–3 inches (5–7.5 cm), similar to other Rhinogobius species.

• Body: Slender, elongated body with distinctive patterns.

• Coloration: Features a pale base color with blue highlights on the fins, especially prominent in males. The fins often display a gradient of blue hues with occasional red or orange accents.

• Sexual Dimorphism: Males are more vibrant and colorful, particularly during the breeding season, while females tend to have subtler tones.

Habitat

• Native Range: Found in streams and rivers of China, particularly in regions near the Shennongjia forest reserve.

• Environment: Prefers cool, clear, fast-flowing streams with rocky or sandy substrates.

• Natural Conditions:

• Well-oxygenated waters.

• Presence of rocks and crevices for shelter and breeding.

Behavior

• Temperament: Generally peaceful, though males can be territorial during breeding.

• Activity: Bottom-dwelling and spends most of its time resting on or near rocks.

• Diet: Omnivorous with a preference for protein-rich foods:

• Aquatic insects and larvae.

• Crustaceans, such as copepods or amphipods.

• Algae and biofilm growing on surfaces.

Aquarium Care

• Tank Size: Minimum of 20 gallons for a pair or small group. Larger tanks are recommended for multiple males to avoid territorial disputes.

• Water Parameters:

• Temperature: 65–75°F (18–24°C); cooler temperatures are ideal.

• pH: 6.5–7.5 (neutral to slightly acidic).

• Hardness: 5–12 dGH.

• Water Flow: High flow is essential to mimic their natural environment. Use a powerhead or strong filter.

• Tank Setup:

• Provide rocks, driftwood, and caves for hiding and breeding.

• Substrate should be sand or fine gravel.

• Plants are optional but can add shade and shelter.

• High oxygen levels are critical, so use strong aeration.

Breeding

• Exhibits fascinating breeding behaviors:

• Males create burrows or guard crevices under rocks or other structures.

• Females lay eggs in these protected areas, and males guard them aggressively.

• Eggs hatch into free-swimming fry, which require tiny live foods like infusoria or baby brine shrimp.

Compatibility

• Tankmates:

• Peaceful, similarly-sized fish such as danios, white cloud mountain minnows, or other small gobies.

• Avoid larger or aggressive species.

• Works well in species-only tanks or with other Rhinogobius species