Northern Threadfin
NameNorthern Threadfin
Scientific NamePolydactylus sheridani
Common NamesNorthern Threadfin, Giant Threadfin, Sheridan's Threadfin
FamilyPolynemidae
OriginIndo-Pacific, Northern Australia, New Guinea
Temperamentsemi-aggressive
Dietcarnivore
Care Leveladvanced
Minimum Tank Size (Gallons)500
Max Size (Inches)54
Water TypeBrackish
Temperature Range (°F)75-82
pH Range7.5-8.5
Compatible SpeciesLarge Snappers, Groupers (large species), Other large, robust brackish/marine fish
Description
The Northern Threadfin is a large, predatory fish characterized by its distinctive free-moving pectoral fin rays. Primarily found in coastal and estuarine waters of the Indo-Pacific, it can tolerate a range of salinities from freshwater to marine. Due to its significant adult size, this species requires an exceptionally large and specialized aquarium.
