Bigeye

There were Port Jackson sharks with a brown back, a whitish belly, and eleven rows of teeth, bigeye sharks with necks marked by a large black spot encircled in white and resembling an eye, and Isabella sharks whose rounded snouts were strewn with dark speckles.

The relatively large eyes may enable the bigeye to feed at lower light intensity than other tunas.

The percentages of bigeye in the catches were relatively high during the early to mid 1950s, but then levelled off at less than 5 percent of the total catches.