Activities here are mostly arranged through the hotels, with at least one excellent independent operator. In addition to the full range of water activities, most hotels can also arrange excursions to Parc National Tsimanampetsotse, as well as whale-watching trips (per person from Ar80,000) to see humpback whales from mid-June or early July to September.
Anakao is one of the best places along the Great Reef to watch humpback whales from mid-June or early July to September. You'll spend around two hours on the water and the whales are regularly seen, sometimes not far beyond the reef. Check wind conditions – it's not really worth going if seas are choppy.
Most hotels offer whale watching, but the experience (and cost) vary. Expect prices to start at Ar80,000 for whale watching, and Ar130,000 if you include time for snorkelling at Nosy Ve. If you organise your trip through Auberge Peter Pan, you'll go out with local fishermen in a small, motorised pirogue. Some of the other operators use larger, more modern boats.