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Yangtze Finless Porpoise


Scientific Name:
Neophocaena asiaorientalis asiaorientalis
Length:
1.5 - 2.5 m (4.9 - 8.25 ft)
Weight:
60 - 160 kg (132 - 350 lbs)
Status:
edangered
Prey:
Fish, crustaceans, cephalods, shrimp and squid

Physical characteristics

Pale blue/grey with a lighter underside. Has a long, thin beak and a flexible neck. The dorsal fin is triangular shaped and the eyes are tiny.

Behavioral characterization

The social structures seem to be underdeveloped and mother/calf pairs are the only stable social constellations.

Distribution

Yangtze River (China)

Population size

Unknown

Predators

Rarely local sharks

Migration/Dispersal patterns

Do not migrate.

Social system/Group size

Usually in groups of 3 - 5.

Major threats

The decrease in food supply through overfishing, pollution, ship strikes and entanglement in fishing gear are the biggest threats to the Yangtze river porpoise. They also suffer from the building of dams and urbanization of that area.

Research efforts

N/A

Fun fact

The population of the Yangtze River Dolphin has rapidly declined over the last 30 years and in November and December 2006 a six week survey was carried out which failed to locate any surviving Yangtze River Dolphins. If they still survive they are the world's most threatened cetacean species.