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Green Phantom Pleco
Hemiancistrus subviridis
Animalia›Chordata›Actinopterygii›Siluriformes›Loricariidae
📍 Orinoco Basin, Venezuela
Also known as L200, this breathtaking pleco displays a bright olive-green body with yellow spots. Highly prized by pleco enthusiasts. Needs warm, well-oxygenated water and driftwood. Cave spawner.
Care Guide
Diet
Green Phantom Plecos are primarily herbivorous and wood-eaters, requiring a diet rich in vegetable matter and driftwood for rasping and digestion. Offer high-quality algae wafers, blanched vegetables (zucchini, spinach, cucumber), and specialized pleco pellets 3-4 times weekly. Supplement occasionally with frozen bloodworms or brine shrimp, but vegetables should comprise 80% of their diet.
Behavior
This pleco is nocturnal and semi-aggressive, spending daylight hours hidden in caves or under driftwood and becoming more active at night. Males are territorial and will defend caves during breeding season, potentially harassing other bottom-dwellers. They are generally peaceful with fish too large to fit in their mouths but may nip at slower-moving species or consume small shrimp.
Breeding
Breeding Green Phantom Plecos in captivity is difficult and rarely achieved by hobbyists. They are cave spawners requiring specific water conditions (warm, slightly acidic, well-oxygenated), multiple hiding spots, and mature males that aggressively guard eggs. Success requires patience, ideal water parameters, and a dedicated breeding setup separate from community tanks.
Tank Mates
Similar algae-eating habits and peaceful nature; may compete for food but generally compatible
Small, peaceful mid-water swimmers that won't compete for bottom space or trigger territorial behavior
Peaceful schooling fish that occupy upper water column and have similar warm water requirements
Bottom-dwellers with similar temperature needs; may compete for food but generally coexist peacefully
Similar warm water requirements but can be territorial; monitor for aggression during breeding season
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, rapid breathing, lethargy, rubbing against objects
Raise temperature gradually to 28-30°C, perform 25% water changes daily, use aquarium salt (1 tsp per 5 gallons) or ich medication; maintain excellent water quality
Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy
Improve water quality with frequent partial changes, remove decaying driftwood, use antibacterial medication if severe; ensure adequate oxygenation
Bacterial Infection
Open sores, cloudy eyes, loss of appetite, torn fins, behavioral changes
Perform 30% water change immediately, treat with broad-spectrum antibiotic medication, isolate if possible, maintain pristine water conditions
Malnutrition/Vitamin Deficiency
Stunted growth, faded coloration, lethargy, loss of appetite
Provide varied diet with quality algae wafers, fresh vegetables, and occasional protein; ensure adequate driftwood for wood-eating behavior
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Quick Facts
- pH
- 5.5–7.5
- diet
- algae/wood/vegetables
- maxSize
- 6 inches
- minTankSize
- 40 gallons
- temperature
- 77–86°F (25–30°C)
Temperature
77–86°F
25–30°C