common bottlenose dolphin
(Tursiops truncatus)
SCIENTIFIC CLASSIFICATION
CURRENT THREATS
CURRENT STATUS
SPECIES OVERVIEW
The common bottlenose dolphin is one of the most widely distributed and well-known marine mammals in the world. Found in tropical and temperate oceans across the globe, this adaptable species inhabits both coastal and offshore environments, from shallow bays and estuaries to deep open waters. Adults typically measure 8 to 12 feet in length and are recognized by their streamlined bodies, curved dorsal fins, and short, well-defined beaks. Highly intelligent and social, bottlenose dolphins live in dynamic groups and communicate through an intricate system of whistles, clicks, and body language.
SPECIES RANGE
The common bottlenose dolphin is found in tropical and temperate waters worldwide. Its range spans every major ocean, with populations occurring along coastlines, in bays and estuaries, and in offshore pelagic waters. Some groups are resident to specific coastal regions, while others travel widely across open ocean habitats.
THE PROBLEMS
As apex predators, bottlenose dolphins play a critical role in maintaining healthy marine ecosystems. They feed primarily on fish and squid, often using cooperative hunting strategies that demonstrate advanced learning and social coordination. Despite their adaptability, many populations face growing pressures from fisheries interactions, habitat degradation, chemical contaminants, noise pollution, and vessel traffic. Because they occupy coastal habitats so closely linked to human activity, bottlenose dolphins are important sentinels of ocean health and reflect the broader challenges facing marine environments worldwide.
WHAT WE ARE DOING AND WHY
Through long term health assessments, clinical research, and collaborative field studies, the National Marine Mammal Foundation works to better understand bottlenose dolphin physiology, disease, and environmental stressors. By advancing marine mammal medicine and applying cutting-edge science, we generate data that inform conservation decisions and strengthen response efforts for wild populations.
Bottlenose dolphins serve as important sentinels of ocean health. By studying their immune function, hearing, reproduction, and overall condition, we gain critical insight into the impacts of pollution, noise, climate change, and emerging threats. This work not only benefits bottlenose dolphins but also helps protect the broader marine ecosystems they represent.
HOW YOU CAN HELP
Your support helps protect the marine mammal species through Operation GRACE and the National Marine Mammal Foundation’s science-driven research, veterinary expertise, and conservation action. Donations directly support health assessments, rescue and response efforts, and collaborative fieldwork with local experts to better understand threats, improve survivability, and protect the river ecosystems these dolphins depend on.
