They get the nets so low, they even snag the bottom at times. So they get all species, from surface to bottom.
When they snag the bottom (there have been numerous incidents) they usually get flipped and/or sink. http://www.courts.qld.gov.au/__data/ass ... 060515.pdf
(Another similar incident about 5 years ago, in the same area, snagging the bottom. The father was killed, his son survived, clutching to a piece of bamboo flotsam, but not until he had drifted in the East Australian Current (EAC) 80 kms south, through that night, all the next day, and all the following night. He was rescued by a lone fisherman 20+ kms off Palm Beach the next morning. Anyone got a link to that story?)
Your point is that they get every species, even ones not suitable for sale, such as dolphins. When, when, when will this type of fishing be banned?