Humpback whale sightings rise in Rio

The resurgence of humpback whales off Rio de Janeiro's coast has led to increased whale-watching tourism, with populations rising from about 2,000 to 35,000 over 40 years, nearing pre-whaling levels. Conservation efforts and international bans on commercial whaling have contributed to their recovery, and scientific studies are underway to understand their migration and behavior in Brazilian waters.

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