Mammals Active day and night

Dall's Porpoise

Phocoenoides dalli

iNaturalist Wikipedia

The fastest porpoise in the world, the Dall's Porpoise is a high-energy acrobat of the North Pacific, recognizable by its 'rooster tail' spray and striking Orca-like markings.

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Quick Identification

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Size

Length of 1.7 to 2.4 meters (5.5 to 7.9 feet) and weight ranging from 130 to 220 kg (290 to 485 lbs).

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Colors

Jet black body with a stark, large white patch on the belly and lower flanks; dorsal fin and tail flukes often have white or light gray 'frosting' on the edges.

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Key Features

Distinctive 'rooster tail' spray when surfacing at high speeds
Striking black-and-white coloration resembling a miniature Orca
Small, triangular dorsal fin with a white tip
Extremely stocky, muscular build compared to other porpoises

When You’ll See Them

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Activity pattern Active day and night

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Peak hours 6 AM - 8 PM (for visual observation)

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Season Year-round, with peak sightings in summer and autumn

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Diet Small schooling fish like herring, hake, and lanternfish, as well as various species of squid.

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Habitat Cool, deep temperate to sub-arctic oceanic waters, often near the continental shelf or deep coastal fjords.

public Geographic range

Where Does the Dall's Porpoise Live?

The Dall's Porpoise is a native of the North Pacific Ocean, thriving in cold-temperate and sub-arctic waters. Its range spans from the coastal waters of Southern California and Baja California, north through the Gulf of Alaska and the Bering Sea, and across to the Sea of Okhotsk and the Pacific coast of Japan. While they are most concentrated in the high-latitude waters of the United States, Canada, and Russia, they are year-round residents in many parts of their range where deep water provides consistent access to prey.

Basemap © OpenStreetMap contributors

6 Countries

15.5M km² Range

Least Concern Conservation

US United States CA Canada JP Japan Russia South Korea MX Mexico

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iNaturalist / Verified observation data

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Behavior

Dall's Porpoises are the fastest of all small cetaceans, capable of reaching incredible speeds of up to 55 km/h (34 mph). They are famous for their energetic behavior, particularly their habit of 'bow-riding'—seeking out the pressure waves of fast-moving boats to surf alongside them. When they swim rapidly just below the surface, they create a unique hollow cone of water known as a 'rooster tail,' which makes them easy to identify from a distance even before you see their bodies.

Unlike many other shy porpoise species, Dall's Porpoises are quite social and curious, often traveling in pods of 2 to 20 individuals. They are highly active hunters, frequently diving to depths of 100 meters or more to find prey. While they are mostly pelagic (open ocean) animals, they are known to approach shorelines where deep water is close to the coast, particularly in the fjords and inlets of the Pacific Northwest.

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Camera Tips

Capturing the Dall's Porpoise on a trail camera requires a specialized setup since they are strictly marine animals. If you have a 'backyard' that overlooks a deep-water pier, a coastal cliff, or a fjord, position your camera at a slight downward angle toward the water. Because they move so quickly, a standard motion sensor may struggle; instead, use a camera with a high-speed trigger or set your device to a high-frequency timelapse mode (e.g., one shot every 5-10 seconds) during daylight hours.

Look for signs of the 'rooster tail' spray to identify high-traffic areas. These porpoises are often attracted to the movement of vessels, so if you are filming from a dock or a boat, keep the camera rolling whenever there is water turbulence nearby. Use a polarizing filter on your lens to reduce the glare from the ocean surface, which will help the camera's AI better detect the stark black-and-white contrast of the animal's body beneath the waterline.

For the best results, aim for days with 'glassy' water and low wind. High waves can create false triggers for motion sensors and hide the porpoise's small dorsal fin. If your camera allows for burst mode, set it to take 3-5 photos per trigger—this increases your chances of catching the animal mid-surface before it disappears back into the deep. While you can't attract them with food, placing your camera near areas where deep currents meet underwater ridges (known as upwellings) will naturally increase your odds of a sighting.

Similar Species

Species that look similar or are commonly confused with Dall's Porpoise.

Pacific White-sided Dolphin

Has a taller, curved dorsal fin and a longer beak; they jump completely out of the water, whereas Dall's Porpoises usually stay low.

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Frequently Asked Questions

Dall's Porpoises are active 24 hours a day, hunting deep-water prey at night. However, for visual sightings and camera capture, they are best observed during daylight hours, specifically during mid-morning and late afternoon when the sun is not directly overhead, reducing water glare.

Since they are marine mammals, you can only 'attract' them if your property is on the coast. They are naturally drawn to the vibration of boat engines and fast-moving wakes. If you are viewing from a pier, they are more likely to appear in areas where deep water currents bring baitfish close to the shore.

Their diet consists of small schooling fish such as herring, capelin, and hake, as well as deep-sea lanternfish and various squid. They are high-metabolism animals and must eat frequently to maintain their energy levels.

They are common only in coastal suburban areas that border deep, cold Pacific waters, such as parts of the Puget Sound in Washington, the fjords of British Columbia, and coastal Alaska.

Dall's Porpoises are larger, much faster, and have striking black-and-white markings similar to a killer whale. Harbor Porpoises are shy, slower, and have a more uniform grayish-brown color without the large white flank patches.

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