There are a number of ferry services by licensed operators connecting Kowloon, Hong Kong Island, Outlying Islands, Mainland China and Macau. The famous 'Star Ferry Service' is the oldest and operates four lines between Kowloon and Hong Kong Island. The view of the stunning skyline and harbor is breathtaking by day and even more so at night.
The others provide service to the outlying islands including Discovery Bay, from Central Ferry station. One can choose between standard and fast ferries which are more expensive.
New World First Ferry Services Ltd: Tel +852 2131 8181, http://www.nwff.com.hk/
The Hong Kong & Kowloon Ferry Ltd: Tel +852 2815 6063, http://www.hkkf.com.hk/
Discovery Bay Transportation Services Ltd: +852 2987 7351, http://www.hkri.com/
Besides these there are fast ferries to Macau and Mainland China. The Hong Kong Macau Ferry terminal is at Sheung Wan and Chin Ferry terminal is at Tsim Sha Tsui.