Gyrinocheilus aymonieri (Golden Morph) — Golden Algae Eater
Family: Gyrinocheilidae
Origin: Rivers and streams of Southeast Asia (Thailand, Laos, Cambodia, Vietnam)
Size: 15–28 cm (6–11 inches)
Lifespan: 10 years or more
 
Natural Habitat
Environment: Fast-flowing rivers, streams, and flooded forests with rocky or sandy bottoms
Water Conditions: Clear, oxygen-rich waters with moderate to strong current
Temperature Range: 22–28°C (72–82°F)
 
Physical Description
Body Shape: Slender, elongated body designed for clinging to surfaces in fast currents
Coloration: Bright golden to yellow body with translucent fins; some individuals show a faint midline stripe
Fins: Clear to slightly golden-tinted, streamlined for maneuverability
 
Aquarium Care
Tank Size: Minimum 55 gallons; larger tanks preferred as they grow
Water Parameters:
pH: 6.0–8.0
Temperature: 22–28°C (72–82°F)
Water Flow: Moderate to strong
Substrate: Sand, smooth gravel, or stones
Décor: Rocks, driftwood, caves, dense plants; strong current and hiding places important
Filtration: Powerful filtration to maintain pristine, oxygenated water
 
Diet
Type: Omnivorous (strong algae grazer when young)
Preferred Foods: Algae wafers, fresh vegetables (zucchini, cucumber, spinach), sinking pellets, and occasional live or frozen foods
Feeding Frequency: Once or twice daily
 
Behavior & Tank Mates
Temperament:
Peaceful when young
May become territorial and aggressive with age, especially toward slow-moving or similar-looking fish
Compatible Tank Mates:
Robust, fast fish (Barbs, Danios, Loaches, larger Tetras)
Avoid long-finned or slow species (like Angelfish, Bettas)
Behavior Notes:
Active algae eater early in life; shifts to a more omnivorous diet as it matures
 
Breeding
Spawning Method: Egg scatterer (breeding in captivity is extremely rare)
Breeding Conditions:
Mostly bred commercially with hormone stimulation
Fry Care:
Not commonly bred by aquarists