Scientific Name: Gymnothorax polyuranodon
Common Name: Freshwater Tiger Moray Eel
Adult Size: Up to 3 feet or more
Lifespan: 10–15+ years with proper care
Temperament: Predatory and territorial
Difficulty Level: Advanced
Minimum Tank Size: 125–180 gallons for adults
Water Type: Best in brackish water long-term
Temperature: 75–82°F
pH: 7.5–8.5
Filtration: Very strong filtration required
Tank Lid: Must be tightly secured — escape artists
They are carnivores and eat:
Shrimp
Silversides
Tilapia pieces
Mussels
Earthworms
Frozen meaty foods
Avoid feeder fish regularly because they can introduce disease.
Can live with:
Large aggressive fish
Datnoids
Large cichlids
Silver dollars
Bigger catfish
Avoid:
Small fish
Shrimp
Slow or delicate tankmates
They can bite if threatened or hand-fed carelessly.
Most “freshwater” tiger morays eventually need brackish conditions for long-term health.
Provide caves and hiding spaces to reduce stress.
They are mostly nocturnal and may hide during the day.
Great display fish for monster fish aquariums, but they require experienced care and a secure setup.
Scientific Name: Gymnothorax polyuranodon
Common Name: Freshwater Tiger Moray Eel
Adult Size: Up to 3 feet or more
Lifespan: 10–15+ years with proper care
Temperament: Predatory and territorial
Difficulty Level: Advanced
Minimum Tank Size: 125–180 gallons for adults
Water Type: Best in brackish water long-term
Temperature: 75–82°F
pH: 7.5–8.5
Filtration: Very strong filtration required
Tank Lid: Must be tightly secured — escape artists
They are carnivores and eat:
Shrimp
Silversides
Tilapia pieces
Mussels
Earthworms
Frozen meaty foods
Avoid feeder fish regularly because they can introduce disease.
Can live with:
Large aggressive fish
Datnoids
Large cichlids
Silver dollars
Bigger catfish
Avoid:
Small fish
Shrimp
Slow or delicate tankmates
They can bite if threatened or hand-fed carelessly.
Most “freshwater” tiger morays eventually need brackish conditions for long-term health.
Provide caves and hiding spaces to reduce stress.
They are mostly nocturnal and may hide during the day.
Great display fish for monster fish aquariums, but they require experienced care and a secure setup.
