What Divers Should Know About Silver Trevally

The Silver Trevally, Pseudocaranx georgianus, is a common jack in the family Carangidae, found cruising the coastal waters of Australia and New Zealand. These fish display a sleek, compressed body, typically a bluish-silver along the back, fading to silver on the belly and a distinctive yellow-silver along their sides. Look for a small black blotch on the bony flap covering the gills – a good identifying marker.

While capable of reaching lengths up to 1.2 meters, divers more commonly encounter individuals between 35 and 60 centimeters. These impressive fish can live for as long as 25 years. You'll often spot Silver Trevally over inshore reefs, in large bays and inlets, and sometimes over open substrates of gravel or sand, inhabiting depths down to 200 meters. They frequent rocky areas along the coast, presenting opportunities for observation across diverse underwater environments.