Blue Neon Stiphodon Goby (Stiphodon atropurpureus) is a small, colorful freshwater goby that has become increasingly popular in the aquarium hobby. Known for their vibrant blue sheen and active behavior, these gobies are native to fast-flowing streams across Southeast Asia, Japan, and Taiwan. They are often kept in planted aquariums and river-style tanks, where their lively personalities and striking appearance make them stand out.

Appearance
The Blue Neon Goby is a slender fish, typically reaching around 2–2.5 inches in length. Males are the most colorful, showing a brilliant electric blue body with darker markings and subtle hints of green or purple depending on the light. Females are usually less colorful, with more subdued gray or brown tones, but still have a graceful, attractive look. Their small size and neon coloration make them a striking addition to freshwater setups.

Behavior
These gobies are peaceful and active, often seen grazing on algae or exploring rocks and surfaces in the tank. They are best kept in groups of several individuals, where males will sometimes display their colors to compete for attention. Despite their bright appearance, they are non-aggressive and make excellent community fish when paired with other peaceful species.

Tank Requirements
Blue Neon Stiphodon Gobies thrive in aquariums that replicate their natural river habitats. A tank of at least 20 gallons is recommended, with a strong current, plenty of oxygenation, and smooth rocks for grazing. Live plants, driftwood, and hiding spots help them feel secure. Since they are bottom-dwellers, a soft substrate or sand is ideal to prevent injury.

Water Parameters
Temperature: 72–80°F
pH: 6.5–7.5
Water Hardness: Soft to moderately hard

Clean, well-oxygenated water is crucial, as these gobies are sensitive to poor water quality. A strong filter and regular water changes will help keep them healthy.

Diet
Blue Neon Gobies are omnivores, with a strong preference for algae and biofilm. In the aquarium, they should be provided with natural algae growth on rocks and driftwood. Supplement their diet with sinking algae wafers, blanched vegetables, and occasional protein sources such as frozen bloodworms or daphnia. A balanced diet ensures that males maintain their vibrant blue coloration.

Tank Mates
These gobies are very peaceful and do well with other small, gentle species. Ideal companions include rasboras, tetras, small danios, and shrimp. Avoid aggressive or overly large tank mates, as they may outcompete or intimidate the gobies.

Breeding
Breeding Blue Neon Gobies in captivity is extremely challenging. In the wild, their life cycle includes migration to brackish or marine environments, where larvae develop before returning to freshwater as juveniles. This makes reproducing them in home aquariums nearly impossible.

Conclusion
The Blue Neon Stiphodon Goby is a lively and eye-catching addition to freshwater aquariums. Their brilliant colors, peaceful temperament, and algae-grazing behavior make them both beautiful and useful for keeping tanks clean. While they require clean, well-oxygenated water and a specialized environment, aquarists who can meet their needs will find them to be a rewarding and stunning species to keep.