Cobalt Blue Goby

The Cobalt Blue Goby (Stiphodon semoni) is a small, freshwater species belonging to the goby family, Gobiidae. It is particularly sought after in the aquarium trade due to its stunning blue coloration and unique behavior.

Key Characteristics:

1. Appearance:

   • Males are vibrant cobalt blue with iridescent scales that shimmer under light.
   • Females tend to be less colorful, often displaying more muted tones like gray or brown with subtle patterning.

2. Size:

   • Typically grows to about 23 inches (57 cm) in length.

3. Habitat:

   • Native to fast-flowing streams and rivers in Southeast Asia and Oceania.
   • Prefers rocky substrates where it can graze on algae and biofilm.

4. Behavior:

   • Peaceful and social; does well in groups but can exhibit mild territoriality, especially among males.
   • Often seen grazing on rocks or swimming along the bottom of the tank in aquariums.

5. Diet:

   • Primarily feeds on algae, biofilm, and small aquatic invertebrates.
   • In captivity, they adapt to specialized sinking foods, blanched vegetables, and algae-based wafers.

6. Aquarium Care:

   • Needs a well-oxygenated tank with strong water flow to mimic its natural habitat.
   • Ideal temperature range is 7278F (2226C) with a pH of 6.57.5.
   • Compatible with other peaceful tankmates like shrimp, snails, and small non-aggressive fish.