Steno bredanensis

The rough-toothed dolphin gets its name from the thin vertical wrinkles that run down the length of their teeth. They can be identified by their sloping head and long beak. Rough-toothed dolphins are not well studied, but they are known to exist in tropical to warm waters of the world’s oceans. They seem to favour offshore waters beyond the continental shelf. Rough-toothed dolphins usually travel in groups of 10 – 20, but group sizes of 50 or more have been observed. They are strong swimmers that often travel with the tip of their beak and chin out of the water. In the Azores, rough-toothed dolphins are encountered only very rarely. In August 2010 a group was sighted, the first time since 1995. The recent sighting was made south of Pico Island by the team of Espaço Talassa. During this rare sighting almost 50 individuals were observed.

Species Details


Male: 2.8 m
Female: 2.65 m
Calf: 1 m


Male: 160 kg

Species Specs

Global population: c.150,000 (population trend unknown)
Status: Least Concern
Diet: Fish, squid, octopus
Teeth: 80 – 108
Longevity: Unknown
Breeding age: Unknown
Gestation: Unknown
Nursing: Unknown

In other languages

Portuguese: Caldeirao
Spanish: Delfín de hocico estrecho, dientes rugosos
French: Dauphin à bec étroit
Italian: Steno
German: Rauhzahndelfin
Dutch: Snaveldolfijn
Swedish: Näbbdelfin
Norwegian: Stroppetannet delfin
Danish: Rutandede Delfin
Polish: Steno długonosy
Russian: Grebnezubyi delfin


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