Rough-toothed dolphin Steno bredanensis (G. Cuvier in Lesson, 1828)
Suborder: Odontoceti Family: Delphinidae
Sightings in Madeira
July to September
ID characteristics
Dark, narrow cape, sometimes not easily distinguished from its grey bluish flanks. White to pinkish underbody
Conical head shape and long, dark, reptilian body
Falcate to triangular dorsal fin, highly erect
Long beak smoothly prolonged from forehead with conspicuous white or pink mouth line, lower jaw and tip
Surface behaviour
Fast swimming, sometimes with tip of beak and chin out of the water
Often several individuals swim shoulder to shoulder, making a line (phalanx)
Distribution
Worldwide between parallels 40º North and 40º South
Deep tropical, subtropical and warm temperate waters around the world
Social
In small groups between 5 to 20 individuals
Diet
Fish and squid
Biometrics
Max length: 2.65 m
Adult weight: 100 to 150 kg
IUCN Status: Least concern
Madeira frequency status: Common
Other languages common names
GER - Rauzahndelfin
FRA - Dauphin à bec étroit, Sténo
ESP - Delfín de diente rugoso, Delfín de pico largo, Delfín de hocico estrecho
SWE - Näbbdelfin
DAN - Rutandet Delfin
ITA - Steno
NED - Snaveldolfijn
POL - Delfin długonosy
POR - Caldeirão
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