Atlantic Spotted Dolphin (Stenella frontalis)

            The Atlantic spotted dolphin (Stenella frontalis) is a dolphin found in warm temperate and tropical waters of the Atlantic Ocean. Older members of the species have a very distinctive spotted coloration all over their bodies.

The coloring of the Atlantic spotted dolphin varies enormously as it grows, and is usually classified into age-dependent phases known as two-tone, speckled, mottled, and fused. Calves are a fairly uniform gray-white, with one or no spots. When they are weaned, speckling occurs, typically between 3 and 4 years and lasting for an average of 5 years. 

A juvenile is considered mottled when it develops merging gray and white spots on the dorsal surface and black spots on the ventral surface. This usually happens between age 8 or 9. A fused pattern is reached when dark and white spots are on both the ventral and dorsal sides. As the animal matures, the spots become denser and spread until the body appears black with white spots at full maturation.

In comparison to other dolphin species, the Atlantic spotted dolphin is medium-sized. Newborn calves are about 35–43 in (89–109 cm) long, while adults can reach a length of 2.26 m (7 ft 5 in) and a weight of 140 kg (310 lb) in males, and 2.29 m (7 ft 6 in) and 130 kg (290 lb) in females. Compared to the much smaller pantropical spotted dolphin, the Atlantic spotted dolphin is more robust. It shares its habitat with the pantropical spotted dolphin and the bottlenose dolphin.

The species exhibits a range of about ten different vocalizations, including whistles, buzzes, squawks and barks, each corresponding with different behaviors.

This image was taken off the coast of Madeira near Funchal in the North Atlantic Ocean.

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Taken on: November 23, 2022

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Dolphins

Atlantic Spotted Dolphins

Funchal

Madeira

Atlantic

Atlantic Ocean

North Atlantic Ocean « less

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Camera: Canon EOS R5, f/5.0, 1/3200 sec, 100mm, ISO 1250 (more info) (hide info)

Camera:	Canon EOS R5
Lens:	RF100-500mm F4.5-7.1 L IS USM
Aperture:	f/5.0
Exposure Time:	1/3200 sec
Focal Length:	100mm
ISO:	1250
Exposure Bias:	0 EV
Flash:	No Flash
Exposure Program:	Shutter speed priority AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	Adobe Photoshop Lightroom Classic 11.5 (Windows)
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