About This Fish

Southern Bluefin Tuna


The southern bluefin tuna (Thunnus maccoyii) is a tuna fish in the family Scombridae under order Perciformes of class Actinopterygii. It is found in the Atlantic, Indian and Pacific Oceans in both temperate and cold seas. It is pelagic fish which moves depth ranges between 0-50 m. It prefers to inhabit temperate waters that are between 5 and 20 °C. It is a very first swimming fish which able to swims up to 70 km per hour.



The southern bluefin tuna is a large streamlined fish with a long slender caudal peduncle. It has relatively short dorsal, pectoral and anal fins. The body is completely covered with small scales. The body color is blue-black on the back and silver-white on the flanks and belly with bright yellow caudal keels. The first dorsal fin color is grey with a yellow tinge while the second dorsal is red-brown and the finlets are yellow with a darker border. The body is deepest near the middle of the first dorsal fin with tapers to pointed snout. The anal fin is dusky yellow in color and the caudal fin is crescent-shaped. The southern bluefin tuna is an opportunistic feeder which takes a wide variety of fish, crustaceans, cephalopods, salps and other marine animals. It is preyed upon by sharks, dolphins, seals and billfishes. The female does not spawn until it reaches around 15o cm in length which corresponds to at least eight years of age. The breeding season runs from September to October until March. It grows up to 250 cm in length and 400 kg in weight. It’s life span ranges from 20 to 40 years.


= Excellent   = Good   = Fair


Location Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Southern Australia
Tasmania