Dwarf Neon Rainbowfish Identification Guide

Key identification features

• One of the smallest rainbowfish species, adults typically 1.2-2 inches (3-5 cm)
• Compact, deep-bodied shape with a short snout and a steep, rounded forehead
• Mature males display saturated iridescent blue along the upper flanks fading to silver below
• Reddish-orange fins with dark leading edges, most vivid in males, especially on the dorsal and anal fins
• Two dorsal fins and a moderately forked tail
• Large, dark eyes that appear oversized relative to the small head

Common look-alikes

• Neon Rainbowfish: essentially the same fish sold under a different trade name, matching in body depth and coloring
• Threadfin Rainbowfish: much slimmer, with long trailing fin filaments this species lacks
• Celebes Rainbowfish: noticeably larger with elongated dorsal and anal fin rays and a blue-green sheen

Where you'll see one

Native to slow, densely vegetated tributaries of the Mamberamo basin in Papua, Indonesia, usually seen in tight midwater schools. It stays close to plant cover rather than venturing into open channels.