Australian Threadfin
NameAustralian Threadfin
Scientific NamePolydactylus multiradiatus
Common NamesAustralian Threadfin, Small-mouthed Threadfin, Many-rayed Threadfin
FamilyPolynemidae
OriginAustralia, Papua New Guinea, Eastern Indian Ocean, Western Pacific Ocean
Temperamentsemi-aggressive
Dietcarnivore
Care Levelintermediate
Minimum Tank Size (Gallons)180
Max Size (Inches)12
Water TypeSaltwater
Temperature Range (°F)72-79
pH Range8.1-8.4
Compatible SpeciesLarge snappers, Large groupers, Other large threadfins
Description
The Australian Threadfin (*Polydactylus multiradiatus*) is a predatory fish known for its distinctive free pectoral fin rays, which it uses to locate prey. It inhabits coastal waters and estuaries of northern Australia and Papua New Guinea. This carnivorous species can grow up to 12 inches and requires a large marine or brackish aquarium.
