(Gray, 1828) - Atlantic white-sided dolphin Distinctive Characteristics Atlantic white-sided dolphins have the typical Lagenorhynchus body shape which is a stocky body with a short thick snout and tall falcate dorsal fin.The tail stock is strongly deepened. A total of 77 updated or new cetacean assessments have now been published in the last 2 years. In the meantime, they are available on request from the COSEWIC Secretariat. Atlantic-white sided dolphins are a sociable species, often coming together to form large pods containing hundreds or thousands of dolphins. They will also sometimes be seen in the company of other species, including much larger baleen whales. What do Atlantic white-sided dolphins look like?. PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. What do Atlantic white-sided dolphins look like?. The populations of the white-sided dolphin and the white-beaked dolphin in the Gulf are estimated at 12,000 and 2600 individuals, respectively. This species is designated “least concern” on the IUCN’s Red List, and does not appear in the List of Endangered and Threatened Wildlife under the American Endangered Species Act. Assessments or reassessments of 6 cetacean species, subspecies or populations were published on the IUCN Red List in December 2019. This is in addition to the 2 published in July 2019, 5 published in March 2019, 35 published in November 2018, 10 in July 2018, and 19 in November 2017. This is in addition to the 2 published in July 2019, 5 published in March 2019, 35 published in November 2018, 10 in July 2018, and 19 in November 2017. The white-beaked is typically larger than the white-sided and lacks the yellow streaks on its side that the white-sided has. Updated: June 2018. These dolphins … The Atlantic white-sided dolphin gets its name from the distinctive white stripe on its side, which starts just below the dorsal fin and runs into a yellow/ochre blaze continuing onto the tailstock which is easily seen when the animal is bow-riding or porpoising. Atlantic white-sided dolphins are thought to be able to reproduce when they are approximately eight to ten years old, with new born calves staying with the parents for a year or two. The colour pattern is complex. The Atlantic white-sided dolphin is a large dolphin named for the distinctive light-coloured patches along its sides. Earlier finds remain unclear because they were sometimes confused with bottlenose (Tursiops truncatus) or common dolphins (Delphinus spp. The back and dorsal fin are black or very dark grey, and patches of lighter grey and white are seen on the flanks. The colour pattern is complex. According to IUCN, the Pacific white-sided dolphin is abundant and widespread throughout its range but no overall population estimate is available. A total of 77 updated or new cetacean assessments have now been published in the last 2 years. In 1991, the Atlantic white-sided dolphin was assessed and deemed “not at risk” by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC). The white-beaked dolphin may easily be misidentified as the Atlantic white-sided dolphin (Lagenorhynchus acutus), as their ranges overlap considerably. Description The back and dorsal fin are black or very dark grey, and patches of lighter grey and white are seen on the flanks. The Atlantic white-sided dolphin was named by John Edward Gray in 1828. (Gray, 1828) - Atlantic white-sided dolphin Distinctive Characteristics Atlantic white-sided dolphins have the typical Lagenorhynchus body shape which is a stocky body with a short thick snout and tall falcate dorsal fin.The tail stock is strongly deepened.