A warm-water dolphin whose spots increase as it grows.
It has a long slender beak and a dark back; newborns lack the spots seen in older animals.
Around Maui Nui in Hawaiʻi, researchers photographed dorsal fins and used natural scars and fin shapes to recognize individual Pantropical Spotted Dolphins. Their 2014–2022 records identified 174 animals. Annual abundance estimates ranged from 105 in 2014 to 232 in 2017; estimates were generally below 250 in the study area, with no clear overall trend across the study period.
Repeated photo matching lets researchers follow animals without capturing them and helps estimate the size of an island-associated group. The result describes nearshore waters around Maui Nui, not the species across its much larger tropical range.
IUCN Red List · Least Concern (LC) · Global
The IUCN Red List classifies the Pantropical Spotted Dolphin as Least Concern globally. Its 2018 assessment cited the species’ broad tropical and subtropical distribution and high abundance in the estimates available at the time. Information on abundance and bycatch remains uneven among regions, and the Maui Nui study found a comparatively small island-associated group. A global category does not describe every local population, so continued monitoring of nearshore groups remains useful.