By user:takoradee - https://commons.wikimedia.org/w/index.php?curid=1661842
Dolfyn
Populations with a pink skin have been observed along the coasts of China and Thailand. They are 2 to 3.5 m in length (6 ft 7 in to 11 ft 6 in) and weigh 150 to 230 kg (330 to 510 lb).
They live in small groups of ten or less. Mature dolphins surface for 20 to 30 seconds to breathe before diving again for two to eight minutes.
The local population around Hong Kong has decreased from 158 in 2003 to just 78 in 2011, according to conservationists in Hong Kong, who issued this warning in 2013.
Because they inhabit the shallower coastal waters, plastic waste and human activities pose a major threat to their survival. Plastic pollution is widespread across all oceans due to the buoyant and durable properties of plastic.
Echolocation, used by dolphins, may also be hampered by plastic litter. All dolphins primarily use echolocation for navigation and to locate prey and to detect predators.
By Georg Wiora (Dr. Schorsch) - https://commons.wikimedia.org/w/index.php?curid=353362
Sources:
(*) https://www.inaturalist.org/taxa/41488-Sousa-chinensis
(*) https://animalia.bio/indo-pacific-humpback-dolphin