Red-spotted Copeina

Geographic Origin and Biotope: Broadly distributed in the central and upper Amazon basin (Brazil, Peru). Inhabits slow-moving streams and lakes, often found near sandy margins in open water rather than hidden in dense swamps.

Taxonomy and Morphology: Member of the Lebiasinidae family (relatives of pencilfish), but much larger and stockier (7-8 cm). Muscular, spindle-shaped body, an upturned terminal mouth, and distinctively large scales.

Social Behavior: Peaceful, bold, and active mid-to-top dweller. Forms loose schools. Males engage in brief, harmless sparring. Not easily intimidated and safe with smaller fish despite its size.

Coloration and Sexual Dimorphism: Silver/lilac body base. The hallmark is that every scale on the male is marked with a brilliant crimson-red spot, giving the fish a uniformly speckled appearance. Male fins are tipped in orange/red. Females are plumper, drabber, and mostly lack the bright red speckling.

Tank Setup: Strong swimmers requiring an 80-100 cm (30-40 inch) tank. FINE SAND SUBSTRATE IS MANDATORY for the male's unique reproductive behavior. Provide open swimming space in the center, with floating plants and tall background plants. A tight-fitting lid is essential as they are powerful jumpers.

Feeding: Voracious, undemanding omnivore. Naturally eats fallen insects. Instantly accepts surface flakes and pellets. To maximize the red spotting, feed frozen bloodworms, daphnia, and wingless fruit flies.

Water Quality: One of the hardiest and most adaptable Amazonian fish available. Thrives in a wide range: pH 6.0-7.5, soft to medium-hard water. Temp 23-28°C (73-82°F). Very forgiving for beginners.

Compatibility: Excellent dither fish for dwarf cichlids, as they stay high in the water column and ignore bottom territories. Safe with peaceful Corydoras and smaller tetras. Keep in a group of 6-8+.

Reproduction: ASTONISHING for a characin. They do not scatter eggs on plants. Instead, the male excavates a pit in the sand with his fins. After the female lays up to 1000 eggs in the pit, the male chases her away and vigorously guards and fans the eggs until they hatch (exactly like a substrate-spawning cichlid).

Risks: 1. Severe belly abrasions on males if coarse gravel is used instead of fine sand during pit-digging. 2. Jumping out of open-top tanks.