Wiktionary
n. The practice of observing whales and other cetaceans in their natural habitat.
Wikipedia
Whale watching is the practice of observing whales and dolphins ( cetaceans) in their natural habitat. Whale watching is mostly a recreational activity (cf. birdwatching), but it can also serve scientific and/or educational purposes. A study prepared for IFAW in 2009 estimated that 13 million people went whale watching globally in 2008. Whale watching generates $2.1 billion per annum in tourism revenue worldwide, employing around 13,000 workers. The size and rapid growth of the industry has led to complex and continuing debates with the whaling industry about the best use of whales as a natural resource.
Usage examples of "whale watching".
Most are sizable, fifty- to seventy-foot cruisers and catamarans, boats full of sunscreen-basted tourists out on the water for anything from dinner cruises to sport fishing to snorkeling at the half-sunken crater of Molokini to, of course, whale watching.