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:
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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.
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Size:
- Typically grows to about 2–3 inches (5–7 cm) in length.
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Habitat:
- Native to fast-flowing streams and rivers in Southeast Asia and Oceania.
- Prefers rocky substrates where it can graze on algae and biofilm.
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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.
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Diet:
- Primarily feeds on algae, biofilm, and small aquatic invertebrates.
- In captivity, they adapt to specialized sinking foods, blanched vegetables, and algae-based wafers.
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Aquarium Care:
- Needs a well-oxygenated tank with strong water flow to mimic its natural habitat.
- Ideal temperature range is 72–78°F (22–26°C) with a pH of 6.5–7.5.
- Compatible with other peaceful tankmates like shrimp, snails, and small non-aggressive fish.
