1. Most river dolphins are almost blind.

2. Although not closely related to other river dolphins, the tucuxi is included here because it shares a similar habitat.

3. Like the Indus River dolphin, boto are also sought after by wealthy institutions in developed countries.

4. No one knows whether river dolphins were once more abundant or whether their numbers have always been low because of their restrictive and specialised habitat.

4. try its best to gather and create good sentences.

5. Chinese River Dolphin is a specific species of rare and valuable animal in the Changjiang drainage area.

6. Two charismatic animals—the Yangtze river dolphin, or baiji, and the Chinese paddlefish, a titan that once reached 7 meters in length—are down to a handful of individuals or have already gone extinct.

7. Jars of oil from river dolphin fat sit alongside oil from anacondas and crocodiles.

8. The Ganges river dolphin is also in grave danger; only a few thousand remain, and they live in some of the most polluted rivers on Earth.

9. As China developed economically, pressure on the river dolphin grew significantly.

10. This is the story of the Baiqi River Dolphin that makes its home in the Changjiang River.

11. Zoologists failed to find a Yangtze River dolphin during a survey of the creature's historic range, the first likely extinction of a large vertebrate in 50 years.

12. River dolphin that scientists have been searching for and have been unable to locate any of the species, they now believe it is extinct.

13. In 1972 the Government of Sind Province declared the river dolphin protected by law and prohibited its killing and trapping.

14. However, some species, such as the beaked whales and the river dolphins, can be almost solitary.

15. Many of them are reportedly gun-happy, and have taken to firing shots at the river dolphins.

16. The simulation model shows that, at high or medium mortality level, the probability of extinction for Chinese River Dolphin is 1. 0 or around 0. 5 within the next 100 years.

17. In China, conservation efforts have already failed to protect the Yangtze River dolphin, the first large aquatic mammal to go extinct since the Caribbean monk seal in the 1950s.

18. Dams have also taken a huge toll on China's biodiversity, causing fisheries to suffer and driving charismatic species such as the Yangtze River Dolphin to extinction.

19. Others have gone extinct - like the Pyrenean Ibex or the Baiji river dolphin.

20. This thesis includes three chapters:1. Some developments in the studies of river dolphin phylogeny based on morphology, paleontology, and molecular biology were reviewed.

21. The messageis the same with the tiger and the Yangzi river dolphin.

22. The greatest threats to marine mammals are being caught in fishing nets or being struck by shipping vessels, although for the Yangtze river dolphin, pollution is a major contributor.

23. Most of the continental U.S. could fit into the massive jungle, and the surrounding rivers and lakes house threatened and vulnerable species like the pink river dolphin and black caiman.

24. At up to 450 pounds and eight feet in length, the Amazon dolphin, or boto, is the largest of the four known species of river dolphin.