Hourglass Dolphin
Cephalorhynchus cruciger
The 'Panda of the Sea,' the Hourglass Dolphin is a high-contrast marvel of the Antarctic. Known for its incredible speed and love for bow-riding, it is one of the rarest and most beautiful sights in the Southern Ocean.
Quick Identification
Size
1.6 to 1.8 meters (5.3 to 5.9 feet) in length; 70 to 120 kg (150 to 265 lbs) in weight.
Colors
Striking jet-black and brilliant white; features a distinct white 'hourglass' pattern on the flanks against a black body.
Key Features
- Vivid white hourglass marking on sides
- Large, hooked (falcate) dorsal fin
- Short, thick snout
- Small, stocky build compared to other dolphins
When You’ll See Them
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Behavior
The Hourglass Dolphin is one of the most energetic and acrobatic species found in the cold southern waters. They are famous among Antarctic explorers for being 'bow-riders,' often racing toward ships to play in the pressure wave created by the hull. They move with extreme speed, often leaping out of the water in a style known as 'porpoising,' which makes them easy to spot even from a distance against the dark ocean.
Socially, they are usually found in small pods of 1 to 14 individuals, though they are highly social with other species. They have a unique relationship with Fin whales and Sei whales; early whalers used Hourglass Dolphins as 'lookouts' because the dolphins were frequently seen swimming alongside the giant whales. While they are curious and bold around vessels, they remain one of the least-studied dolphins due to their remote habitat.
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Camera Tips
Capturing the Hourglass Dolphin requires a different approach than typical backyard wildlife, as these are pelagic animals found in the Southern Ocean. If you are on a vessel in their range, the best way to 'trap' them on camera is by utilizing a high-speed action camera mounted to a stabilizer or a gimbal. Because they love bow-riding, mount your camera at the lowest safe point on the ship’s prow, angled downward toward the water's surface. This allows you to capture their incredible speed and the way they weave through the wake.
For the best results, use a fast shutter speed (at least 1/2000s) to freeze the motion of the water and the dolphin’s leaps. The high contrast between their white markings and the dark water often tricks camera sensors into overexposing the white areas. Set your exposure compensation to -0.7 or -1.0 to preserve the detail in their white patches. A circular polarizing filter is mandatory; it cuts the reflection off the ocean surface, allowing your camera to see the dolphins even when they are a few feet underwater.
If you are using a trail-style camera from a stationary point (like a research station or a shoreline during a rare coastal approach), use a 'burst mode' triggered by motion. These dolphins move incredibly fast, and a single-shot trigger will often result in a photo of a splash rather than the animal. Set the camera to record 5-10 frame bursts. In terms of timing, the 'Golden Hour' in the Antarctic summer can last for a long time, providing soft, side-lit conditions that highlight the texture of their skin and the unique shape of their dorsal fins.
Similar Species
Species that look similar or are commonly confused with Hourglass Dolphin.
Peale's Dolphin
Lacks the distinct hourglass shape and has a more complex grey-and-white pattern on the flanks.
Dusky Dolphin
More muted grey tones and a shorter, less hooked dorsal fin than the Hourglass Dolphin.
Commerson's Dolphin
Has a 'panda' pattern but the white covers most of the midsection rather than an hourglass shape.
Frequently Asked Questions
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