Mexican authorities and scientists are trying to save the world’s smallest porpoise by capturing illegal "ghost" fishing nets.
They have managed to remove more than 100 dumped or lost nets left floating in the sea from October to December.
Local fishermen and conservationists helped to trawl 11,814km in the Gulf of California, the only area where the vaquita porpoise live.
Its population is estimated to be down to about 60 individuals.Conservationists say they fear the porpoise will be extinct by 2022.
The main threat to the porpoise are the nets used to illegally catch fish known as the totoaba which is hunted for its swim bladder - fetching tens of thousands of dollars on the black market in China.
The population of the vaquita marina porpoise has dropped despite government measures to prevent illegal fishing with the deployment of navy ships in April 2015.
It went from 200 in 2012 to fewer than 100 in 2014 and now stands at about 60, according to the International Committee for the Recovery of the Vaquita（CIRVA）.
dump：動詞，拋棄；亂扔，亂丟。例句：Toxic chemicals continue to be dumped into the river.（有毒化學物質持續被倒入河流。）
extinct：形容詞，滅絕的；絕種的；消失的。例句：Many tribes became extinct when they came into contact with Western illnesses.（許多部落由於感染西方人的疾病而消失。）
stands at：動詞，某物狀態是…。例句：The share price is currently standing at $3.（股價目前約3元。）