Range Spinner dolphins live in warm ocean waters around the world. Diet Spinner dolphins are carnivores. Behavior Spinner dolphins travel in groups called schools, which can be very large, sometimes with hundreds of dolphins together. Conservation Tuna fishing is one of the biggest threats to spinner dolphins. Fun Fact Dolphins communicate with one another through echolocation.
Donate Today. Sign a Petition. Donate Monthly. Nearby Events. All trick, no treat? The high price of harvesting cocoa for chocolate Read More. Spinner dolphins are the most commonly seen dolphin in Hawaiian waters. There are about 2, to 3, individuals that live in different stocks.
The distinct stocks are: 2 in the Northwest Hawaiian Islands, 1 stock in Oahu and Maui Nui waters, 1 stock in Big Island waters and 1 deep sea pelagic stock. These animals do not interbreed between stocks so the species is very vulnerable. Spinner dolphins are between to pounds in weight, 6 to 7 feet long and can live about 20 years.
They are known for the above-water displays of leaping and spinning. They also consume mesopelagic fish as well as epipelagic and mesopelagic squid and shrimp.
These dolphins have polygynandrous promiscuous mating system. Usually, members of a school mate with each other without selection.
Spinner dolphins are seasonal breeders with 1 - 2 peak periods. Females give birth with an interval of 2 - 3 years.
The gestation period lasts for Newborn dolphins grow up very quickly due to feeding upon maternal milk for about 6 months, after which they complement their diet with other types of food. The young is nursed by its mother for the first two years of its life. The mother and baby usually form a close, lifelong relationship. Males of this species are sexually mature by 10 - 12 years old, whereas females are ready to breed within 5. Currently, the biggest threat to the population of this animal is fishing.
Thus, Spinner dolphins often associate with tuna, which makes them a target, and the animals are often caught in fishing nets. They are often entangled in fishing gear as well as hunted in the Caribbean, Sri Lanka, and the Philippines. On the other hand, the animals suffer from coastal development, reaching sheltered bays, which are used by these dolphins as resting areas during the day. According to the IUCN Red List, the total population size of the Spinner dolphin is unknown for today, but there are estimates for specific populations in the following areas: in the northern Gulf of Mexico - 11, animals; in Hawaiian waters - 3, individuals; in the southern part of the Sulu Sea and north-eastern Malaysian waters - 4, dolphins; in the southeastern Sulu Sea - 31, animals; and finally, the Eastern spinner dolphin sub-species - , individuals.
Spinner Dolphin Long-beaked dolphin, Long-snouted dolphin. Stenella longirostris. Population size. Life Span. Photos with Spinner Dolphin. Distribution The Spinner dolphin is generally a pelagic animal, distributed across the Atlantic, Indian and Pacific oceans. Geography Continents. Animals Climate change is shrinking many Amazonian birds.
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