1. (i) maritime
2. (i) They become pink when they exert energy.
(ii) They have blood vessels just below their skin.
3. There are only 47 pink dolphins left in the seas around Lantau Island; a lot of young pink dolphins die/the death rate of pink dolphin calves is high.
5. (i) half
6. (i) F
7. (i) more marine parks
(ii) It would help numbers of pink dolphins increase in Hong Kong, and their long-term growth in the Pearl River Delta.
8. go on a boat trip organised by Hong Kong Dolphinwatch; participate in the Saving the Handover Mascot movement (either answer)