Rough-toothed dolphin – Steno bredanensis – Στενόρυγχο δελφίνι
Other common names:
FR – sténo
ES – delfín de dientes rugosos
IT – steno
DE – Rauzahndelfin
Formerly considered a visitor of the Mediterranean Sea, it is now tentatively considered regular in the eastern Mediterranean due to recently documented sightings. The species derives its common name from the vertical ridges in the teeth, which give them a roughened appearance. S. bredanensis is the only long-beaked dolphin with a smoothly sloping melon (forehead) that gently blends into the upper beak. The body is not very slender and the anterior portion may be stocky. The large pectoral (side) fins are set farther back on the body than in most other delphinds. The dorsal fin is tall and only slightly recurved. Some large males may have a hump posterior to the anus resembling a keel. Rough-toothed dolphins are countershaded with white bellies and black to dark grey backs. The sides are medium grey and separated from the cape on the back. Size reaches 2.6 m in females and 2.8 m in males, and body mass may reach 155 kg.
IUCN Red List classification: Listed as Least Concern globally (IUCN 2008).