What is the conservation status of the Common Bottlenose Dolphin?

The Common Bottlenose Dolphin is listed as Least Concern on the IUCN Red List. Widespread and abundant. Not currently at risk of extinction in the wild.

Where is the Common Bottlenose Dolphin found?

The Common Bottlenose Dolphin is found in United States, Mexico, Brazil, Argentina, United Kingdom, Ireland, Portugal, Spain, France, Italy, Greece, South Africa, Australia, New Zealand, Japan, China, India, Indonesia, Philippines, Bahamas, Cuba, Colombia, Peru, Chile, Senegal, Kenya, Mozambique, Israel, Turkey.

Common Bottlenose Dolphin (Tursiops truncatus) — Conservation Status & How to Help

About the Common Bottlenose Dolphin

The Common Bottlenose Dolphin (Tursiops truncatus) is a medium-to-large cetacean found in temperate and tropical oceans worldwide, typically reaching 2 to 4 meters in length and recognized by its robust body, short beak, and distinctively curved dorsal fin. Populations live in both coastal and pelagic habitats, from shallow estuaries and bays to open ocean, and they are among the most socially complex marine mammals, forming fluid groups called fissions-fusions that shift in composition depending on activity, season, and individual relationships.

As apex predators in many of the systems they inhabit, Common Bottlenose Dolphins help regulate fish and cephalopod populations and serve as sentinels for broader ocean health, since pollutant loads in their blubber reflect the condition of the food web beneath them. The IUCN Red List currently classifies the species as Least Concern, but coastal populations face documented pressure from entanglement in fishing gear, boat strike, chemical and noise pollution, and prey depletion driven by overfishing. Certain geographically isolated subpopulations, such as the Fiordland population in New Zealand and several eastern tropical Pacific groups, carry distinct conservation concerns even where the global status remains stable.

Things worth knowing

Common Bottlenose Dolphins use individually distinct whistles, known as signature whistles, that function similarly to personal names and allow them to identify one another even after years of separation.
Some populations in Shark Bay, Australia, have been observed carrying marine sponges on their rostra while foraging on the seafloor, a tool-use behavior that is culturally transmitted from mothers to daughters.
Their echolocation clicks can reach frequencies above 100 kHz, well beyond the upper limit of human hearing, and the returning echoes give them detailed three-dimensional information about objects in the water column.
A Common Bottlenose Dolphin's skin is replaced roughly every two hours, a rate of cell turnover that helps reduce drag and may assist in managing microbial fouling.
Pollutant studies have recorded concentrations of PCBs and organochlorine compounds in the blubber of western European coastal dolphins that exceed the thresholds at which immune and reproductive suppression occur in experimental models.
Some individuals in the Moray Firth, Scotland, have been photo-identified and tracked for over 30 years, with known lifespans in the wild extending beyond 50 years in females.

Common Bottlenose Dolphin

Things worth knowing

0 organizations protect the Common Bottlenose Dolphin