Origin
Found in coastal river basins of northern South America, including the Amazon delta, Orinoco basin, and Guianas.

Visual & Behavioral Appeal
Displays a semi-transparent “x-ray” body where internal organs and spine are faintly visible. Fins show bright splashes of yellow, black, and red, especially in males. Schools gracefully in mid-water and reacts dynamically to current and light.

Purpose
Great as a dither fish and movement anchor. Helps reduce aggression in shy or territorial species and adds life to the midwater zone without overwhelming the tank visually.

Importance
Longstanding staple of freshwater aquariums. Its schooling behavior, peaceful temperament, and hardiness make it an ideal first fish or companion species for diverse tanks.

Included Resources
No special requirements—thrives in standard tropical setups. Soft to moderately hard water, moderate flow, and open swimming areas recommended. Fine gravel or sand substrate works best.

Best Use Cases
Perfect for planted tanks, beginner community aquariums, and South American biotopes. Can adapt to blackwater or clearwater systems and pairs well with peaceful inverts.

Conservation Context
Wild populations are stable, and most aquarium stock is now captive-bred. Its resilience helps introduce sustainable fishkeeping to newcomers.

Ideal Aquatic Species
• Corydoras catfish
• Dwarf gouramis
• Pencilfish
• Otocinclus
• Shrimp (in large or well-planted setups)

Region (A)
• Latitude: 3.3733° N
• Longitude: -59.7966° W
(Eastern Guyana — Essequibo River basin)

Region (B)
• Latitude: 0.5806° N
• Longitude: -50.6311° W
(Amapá, Brazil — Amazon delta tributaries)