Moenkhausia cosmops Large/XL Aquarium Glaser

Moenkhausia cosmops, also known as Bario cosmops, is a small, vividly colored freshwater tetra native to Brazil. 

Species Overview

• Scientific Name: Moenkhausia cosmops (now often classified under Bario cosmops)
• Family: Characidae (Tetras)
• Origin: Tributaries of the upper Rio Sepotuba (Paraguai basin) and Rio Juruena (Tapajós basin), Brazil

Size & Lifespan

• Average Size: 4–5.4 cm (1.6–2.1 inches)
• Max Size: ~6 cm
• Lifespan: Estimated 3–5 years in captivity

Water Parameters

• Temperature: 24–28°C (75–82°F)
• pH: 6.0–7.0
• Hardness: 2–8 dGH
• Tank Size: Minimum 150 liters (40 gallons) for a small group

Appearance

• Unique blue-green eyes
• Red stripe above the mouth
• Silvery body with subtle ornamentation
• Resembles Emperor Tetras and Lipstick Barbs in coloration, but not closely related

Behavior & Compatibility

• Social Structure: Shoaling species; best kept in groups of 5 or more
• Temperament: Generally peaceful but can be slightly aggressive toward smaller or slower tankmates
• Activity: Diurnal; mid-water to surface dwelling

Diet

• Omnivorous
• Wild diet includes:
  • Insects (especially ants)
  • Plant matter
  • Algae
• In captivity: Accepts flakes, micro pellets, frozen foods (daphnia, brine shrimp), and vegetable matter

Breeding

• Reproduction: Egg scatterers
• Lay eggs among vegetation
• No parental care
• Breeding in captivity is possible but not commonly documented

Habitat & Tank Setup

• Prefers clear, moderately flowing water with sandy substrate
• Found in backwaters near marginal macrophytes and submerged branches
• Forms large schools (>50 individuals) in nature
• Provide:
  • Dense vegetation
  • Driftwood and leaf litter
  • Gentle filtration mimicking natural flow