Below the ocean surface is a silent motionless world where all marine predictors hunt.
All marine predators use this fact to find prey by detecting sound, motion or the smell of their intended meal.
A pod of Dolphin will detect a school of bait-fish with their sound detecting sonar and because Dolphin are such noisy communicators they alert other marine predictors like Seals, Penguins, Birds or Whales that a school of bait-fish has been detected.
The carnage of marine predators feeding on a ball of bait-fish will attract marine predators from miles; the birds will dive from above while fish and sea mammals feed from below.
The entire marine predator hunting method has changed with the advent of commercial fishing monsters scooping up thousands of tons of fish off our coast.
Now the marine predators recognize the sound, motion and smell of commercial fishers who have located fish with electronic sonar and pulled in through the use of long line or nets entire schools of the very bait-fish marine predators need to survive.
As a result hundreds of thousands of surface hunting marine predators have been killed by the commercial fishers in their pursuit profit from fish below the surface of the sea.
The vast number of marine species that have been depleted and discarded without any reason other than monetary greed have been belittled by commercial fishers for years and simply known as bi-catch.
While marine conservationist and scientists realised pretty quick that fish stocks and marine predators like sharks, dolphin, and most species of tuna were seriously depleted, those conservationists and scientists on land reported that land dwelling marine predators like seals, penguins, turtles and seabirds were at risk of extinction as a direct result of commercial fishing methods.
The commercial fishers have always tended to cover up its atrocities against the fisheries by contracting it's fishers to secrecy rather than recognizing any wasteful problem it may have.
The internet and cellphone cameras meant that conservationists and scientists all over the world could photograph and share the commercial fishing secrets in seconds for a few cents anywhere in the world.
The commercial fishing industries fear of being caught killing marine mammals as bi-catch has led to the biggest public con job on the NZ public by the fishing industry so far.
Through hull cutters, offal dispensers are huge munching machines working away munching up unwanted bi-catch of the commercial fishing fleet and dispensing it through the hull of the fishing vessel under the water, out of sight.
The fishing industry is trying to justify the sneaky munching up of unwanted bi-catch by calling the munchers "bird mitigation devices" if that is the case then my lawn mower is a "grass recycling machine" my grass may get turned into compost, but my lawn mower doesn't do it, it's just a lawn mower.
The through hull cutters should never have been made legal in NZ. The cutters were made legal because the NZ commercial fishers kept getting caught committing illegal acts against the NZ fishery every time the public beaches got covered in legal fish that the commercial fishers had discarded while high grading their catch for a few dollars more.
They only way forward for the NZ commercial fishery is to ban the indiscriminate method of trawl, seine commercial fishing inside the 12nm limit and make all other commercial fishers land all catch.
If commercial fishers are going to kill any type of fish it must be landed and the protein used. The disgusting commercial fishing industry of NZ is the only industry in NZ that continually kills living things only to throw them away.