Hourglass Dolphin
Mammals diurnal

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.

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Quick Identification

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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.

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Colors

Striking jet-black and brilliant white; features a distinct white 'hourglass' pattern on the flanks against a black body.

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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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Activity pattern diurnal
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Peak hours 9 AM - 5 PM (Most visible during daylight hours)
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Season November-March (During the Antarctic summer)
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Diet Primarily feeds on lanternfish, squid, and various crustaceans found in the nutrient-rich Antarctic Convergence.
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Habitat Pelagic (open ocean) waters of the Southern Ocean, specifically near the Antarctic ice edge and sub-Antarctic islands.

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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.

Frequently Asked Questions

Hourglass Dolphin are most active during the day when they can be seen hunting and bow-riding, though they likely forage for bioluminescent squid at night as well.
You don't need bait; Hourglass Dolphin are naturally attracted to the movement and wake of fast-moving vessels and will often swim toward ships to bow-ride.
Their diet consists mainly of small fish, squid, and crustaceans that thrive in the cold, nutrient-rich waters of the Antarctic Convergence.
No, they are strictly pelagic mammals, meaning they live in the deep open ocean far from human suburbs, specifically in the Southern Ocean.
While both are black and white, the Hourglass Dolphin is much smaller (under 6 feet) and has a distinct white 'hourglass' on its side, whereas a Killer Whale is massive and has a white 'eyepatch.'

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