In industrial scale fishing operations, 20 percent of world catches are discarded and returned to sea without life. More than 300,000 small whales, dolphins, and porpoises die each year when they happen to have been caught in mesh fishing.
Such fishing operations kills thousands of loggerhead turtles and leatherback turtles each year, making the latter now critically endangered, 26 species of seabirds, including 17 species of albatross, are threatened by industrial longlining operations.
These accidental catches are discarded and returned to sea already without life.
SRI LANKA's Small Scale Artisanal Fishery uses deep-set long lines as the only method employed in harvesting of exportable tuna. Hooks spacing is approx. 50m to 70m with 22m branch lines causing NO danger to seabirds and the depths these lines are set to, avoid shark , turtle and juvenile by - catch.