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Yangtze Finless Porpoise
Mammals diurnal

Yangtze Finless Porpoise

Neophocaena asiaeorientalis

The Yangtze Finless Porpoise is one of the few remaining freshwater cetaceans on Earth, known for its gentle 'smile' and incredible intelligence. This rare and endangered 'river pig' serves as a vital indicator of the health of Asia's longest river.

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Quick Identification

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Size

Length of 1.2–1.9 meters (4–6.2 feet); weight range of 30–72 kg (66–158 lbs).

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Colors

Uniform steel gray or pale gray skin; turns significantly darker or black after death; no distinct color difference between sexes.

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Key Features

  • Complete lack of a dorsal fin
  • Blunt, rounded head with a distinctive 'smiling' mouth line
  • Small, dark eyes and no visible beak
  • Prominent dorsal ridge with small bumps called tubercles

When You’ll See Them

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Activity pattern diurnal
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Peak hours 7-10 AM and 3-6 PM
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Season Year-round, but most visible December-March when lower water levels concentrate them in deep channels.
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Diet A generalist feeder that hunts small to medium-sized freshwater fish, shrimp, and squid found in the river's main stem and connecting lakes.
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Habitat Exclusively freshwater, found in the main channel of the Yangtze River and its large connected lakes like Poyang and Dongting.

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Behavior

Often referred to as the 'smiling angel,' the Yangtze Finless Porpoise is a highly intelligent and social creature. Unlike many of its marine cousins, it is generally shy and avoids the 'bow-riding' behavior common in other dolphins. They are most often seen in pairs or small family groups, though they may congregate in larger numbers at the mouths of lakes where fish are plentiful.

These porpoises use a sophisticated form of echolocation to navigate the silt-heavy, murky waters of the Yangtze River. Because they lack a dorsal fin, their swimming style is quite subtle; they break the surface with a gentle rolling motion that can be easy to miss if the water is choppy. They are known for their playful nature within their pods, often engaging in 'tail-slapping' or brief, energetic rolls at the surface.

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Camera Tips

Capturing the Yangtze Finless Porpoise on a trail camera requires a specialized setup since you are dealing with a moving aquatic target. If you live along the riverbanks or near the large lakes they inhabit, position your camera on a high vantage point—about 2 to 3 meters above the water line. This elevated angle helps minimize the 'flat' look of the water and allows the camera to see the porpoise’s back as it breaks the surface. Use a high-speed shutter setting if your device allows, as these animals only surface for a second or two to breathe.

Since you cannot use traditional bait, your best 'lure' is the natural movement of fish. Look for areas where the current slows down, such as the downstream side of sandbars or near bridge pilings, as porpoises often linger in these spots to hunt. A fast trigger speed is non-negotiable; look for cameras with a 0.2-second response time or use 'Burst Mode' to ensure you don't just capture a splash or a ripple. A polarizing filter for your lens is highly recommended during the day to cut through the sun's reflection on the water's surface.

For those using underwater housing or specialized dock-mounted cameras, placement is key. Focus on the 'transition zones' where the shallow lake margins meet the deeper river channels. Ensure your camera is securely anchored against the river's current. If you are monitoring at night, standard infrared (IR) flashes can sometimes bounce off the water's surface, creating a 'white-out' effect. To avoid this, angle your camera slightly away from the direct reflection of the moon or nearby city lights. Focus on 'quiet zones' where boat traffic is limited, as the animals are more likely to linger and display natural social behaviors in these areas.

Similar Species

Species that look similar or are commonly confused with Yangtze Finless Porpoise.

East Asian Finless Porpoise

Nearly identical in appearance but lives in coastal saltwater/estuaries rather than freshwater river systems.

Indo-Pacific Finless Porpoise

Found in warmer coastal waters and possesses a narrower dorsal ridge compared to the Yangtze subspecies.

Frequently Asked Questions

They are active throughout the day and night, but for observation and camera capture, they are most easily spotted during the early morning and late afternoon when light is softer and river traffic is often reduced.
You cannot attract them with food like land animals. However, if you live on the Yangtze riverfront, maintaining a quiet shoreline and supporting local fish conservation helps ensure they frequent the waters near your property.
They have a varied diet consisting of various freshwater fish, shrimp, and occasionally squid found in the river beds.
They are only found in specific stretches of the Yangtze River and its connecting lakes. They are sometimes visible from the embankments of major cities like Wuhan or Nanjing that sit directly on the river.
The Baiji (Yangtze River Dolphin) had a very long, narrow beak and a distinct dorsal fin, whereas the Finless Porpoise has a blunt head and no dorsal fin at all. Note that the Baiji is now sadly considered functionally extinct.

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