Engineer Goby (Pholidichthys leucotaenia)
Due to variations within species, your item may not look identical to the image provided. Approximate size range may also vary between individual specimen.
Biochemical Traits
- Moderate activity level
- Peaceful temperament
- Coloration: Black, Blue, White
- Diet: Carnivore
- Compatible with community tanks
Water Conditions
| Parameter | Range |
|---|---|
| Temperature | 72-78°F |
| dKH | 8-12 |
| pH | 8.1-8.4 |
| Specific Gravity | 1.020-1.025 |
Size & Habitat
- Adult size: 1′
- Origin: Indo-Pacific
- Family: Pholidichthyidae
- Minimum tank size: 55 gallons
The Engineer Goby is also commonly referred to as the Convict Goby. It is in a separate family from the typical gobies.
FAQ
What is the typical behavior of the Engineer Goby?
The Engineer Goby is generally peaceful and moderate in activity, making it suitable for community tanks with compatible fish.
What water parameters does the Engineer Goby require?
It thrives in water with a temperature between 72-78°F, dKH of 8-12, pH between 8.1-8.4, and specific gravity of 1.020-1.025.
Is the Engineer Goby suitable for a small tank?
No, a minimum tank size of 55 gallons is recommended due to its size and environmental needs.

Stephen Johnston –
The Engineer Goby is a calm and active fish that fits well in my 55-gallon tank. It has adapted to the water parameters quickly and doesn’t show aggression toward other species. The coloration is quite striking with blue and white markings. It’s a good addition to a peaceful community tank.
Justin Hunter –
I received a healthy specimen that matches the description. It’s peaceful and stays near the substrate. I’ve maintained the recommended water parameters and it’s thriving. A bit smaller than expected, but still impressive.
Tracey Cameron –
This fish is easy to care for and has a unique appearance. It’s not overly active but still engages with the environment. I’ve kept it with other peaceful community fish and there’s been no conflict. The water conditions are stable and it’s doing well.