Queensland State Archives posted a photo:
Artwork by George Coates.
Yellowfin tuna are torpedo-shaped with dark metallic blue backs, yellow sides, and a silver belly. They have very long anal and dorsal fins and finlets that are bright yellow. Yellowfin can live up to six or seven years. They are highly migratory and are found throughout the Pacific, Atlantic and Indian Oceans.
They often travel in schools with similarly sized companions, and mixed schools with other tunas like slipjack and bigeye are commonplace. They are also known to associate with dolphins or porpoises, as well as with larger marine animals such as whales and whale-sharks.
Yellowfish tuna prey includes other fish, pelagic crustaceans, and squid. Like all tunas, their body shape is particularly adapted for speed, enabling them to pursue and capture fast-moving baitfish such as flying fish, sauries, and mackerel. Large yellowfins prey on smaller members of the tuna family such as