Sightings of humpback whales off Rio de Janeiro are increasing during the whales’ annual migration, according to multiple reports. The rise in sightings is linked to the species’ recovery after commercial whaling reduced its numbers in the past. One source (citing AP) reports that the humpback whale population has grown substantially, from roughly 2,000 to about 35,000, as recovery continues. As whales appear more frequently near Rio’s coastline, demand for whale-watching trips is also reported to be accelerating, with tour operators offering excursions timed to the migration period. The reports describe humpbacks as long-distance migrants that travel across major oceans in predictable patterns. Overall, the coverage focuses on two related developments: more whales are being observed off Rio, and the increased presence is driving greater interest and capacity in whale-watching activities during the seasonal migration.