Peacock Goby Identification Guide
Identify the Peacock Goby by its small rounded body, iridescent blue spangles, and dark eyespot at the base of the tail.
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Key identification features
- Small, compact, slightly elongated body with a rounded head
- Peachy-orange to tan base coloration, especially vivid in males
- Scattered iridescent blue spots and streaks covering the body and fins
- A distinct dark, ringed eyespot (ocellus) at the base of the tail
- Two dorsal fins, with males showing longer, more pointed fin extensions than females
- Stays small, usually under 5 cm
Common look-alikes
- Knight goby: much larger with bold black blotches rather than fine iridescent blue speckling
- Other freshwater dwarf gobies: lack the combination of peach body tone, blue spangling, and a clear tail-base eyespot seen together in this species
- Certain small cichlids: can show iridescent flecking but have a deeper body shape and lack the fused pelvic sucker disc of true gobies
Where you'll see one
Peacock gobies are native to slow-moving freshwater streams, pools, and swamps in Papua New Guinea, often among leaf litter, submerged wood, and dense vegetation. They stay close to cover near the bottom rather than schooling in open water, with males frequently seen displaying their fins and colors to defend small territories.
Frequently asked questions
How do I tell a peacock goby from a knight goby?
Size and pattern separate them clearly: the peacock goby is tiny with fine iridescent blue spangling on a peach body, while the knight goby is larger and marked with bold black blotches.
What single mark best confirms a peacock goby identification?
Look for the dark, ring-edged eyespot at the base of the tail combined with scattered blue iridescent speckling across an orange-peach body.