Red Tail Goby

The Red Tail Goby is a stream-dwelling grazer that rests on rocks and explores surfaces close to the bottom. Mature males can develop vivid blue body color and a red tail during display, while juveniles and females are generally much more subdued.

Fish details

• Scientific name: Sicyopterus lagocephalus
• Size offered: 3–3.5 cm
• Adult size: Can reach approximately 13 cm
• Origin: Tropical Indo-Pacific streams
• Water type: Freshwater for the aquarium stage
• Temperament: Can defend feeding and resting territories

Recommended aquarium conditions

• Aquarium: 30 US gallons or larger, with ample rock surfaces and floor space
• Temperature: 22–26°C (72–79°F)
• pH: 6.5–7.5 as a practical aquarium target
• Water movement: Strong oxygenation and stream-style circulation

Use a well-established aquarium with smooth stones covered in natural algae and biofilm. Arrange resting spots outside the strongest flow and keep rockwork stable. A secure cover is essential because these gobies can climb and escape through openings.

Diet and feeding

Natural grazing is central to this species' care. Provide abundant mature algae and biofilm, and supplement with suitable algae-based sinking or gel foods where accepted. Do not rely on occasional meaty food or assume that a spotless new aquarium can provide enough nutrition. Observe its body condition and grazing activity.

Compatibility and care

Choose peaceful stream-compatible companions and avoid aggressive bottom dwellers or excessive competition from other grazers. Multiple males need distinct territories and enough food-bearing surfaces. Maintain clean, oxygen-rich water with consistent partial changes, while preserving useful grazing areas. Marine larval development does not mean an aquarium juvenile or adult requires salt. Breeding is a specialist project, and the intense display colors should not be expected on every fish at all times.

Sizes are approximate. Contact Las Vegas Exotic Fish at (702) 685-5100 to confirm availability or discuss your setup.