Taxonomy
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Mammal
- Order
- Artiodactyla
- Family
- Delphinidae
- Genus
- Stenella
Habitat
Spinner dolphins primarily inhabit warm tropical and subtropical oceans, including the Pacific, Indian, and Atlantic, often in offshore pelagic waters deeper than 200 meters. They prefer areas near continental shelves, islands, or coral reefs where food is abundant, and are commonly found in groups swimming in open sea.
Diet
Spinner dolphins mainly eat small fish such as lanternfish and squid, which they hunt in coordinated groups using echolocation. They feed at night in deeper waters where prey congregates, diving to depths of up to 200-300 meters to capture their food.
Behavior
Spinner dolphins are highly social, forming large pods of 50 to several hundred individuals that include subgroups based on age and sex. They are diurnal, spending much of the day in playful activities like leaping, spinning, and bow-riding alongside boats, while being less territorial and more nomadic in their movements. These dolphins communicate with clicks, whistles, and body language, and they often travel long distances in search of food.
Conservation Status
The spinner dolphin is classified as Least Concern by the IUCN, though some populations are decreasing due to threats like bycatch in tuna fisheries. Major threats include entanglement in fishing nets and habitat disruption from marine pollution.