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📰 The quick summary: Sightings of blue and fin whales off the coasts of Namibia and South Africa have increased markedly since 2012, offering fresh evidence that both species are slowly recovering more than 40 years after commercial whaling ended.
📈 One key stat: A striking 95% of all blue and fin whale observations recorded off the southeastern Atlantic coast over a 60-year study period have come since 2012, pointing to a meaningful uptick in their presence in the region.
💬 One key quote: “Our results provide important evidence that these giants of the ocean are slowly recovering from the devastating impact of 20^th century commercial whaling, which pushed them to the brink of extinction,” said study lead author Dr. Bridget James.

1️⃣ The big picture: Blue and fin whales are the two largest species on Earth, and both were pushed to the edge of extinction during the industrial whaling era, when an estimated 350,000 blue whales and 725,000 fin whales were killed between 1913 and 1978. More than four decades after the end of commercial whaling, a new study has compiled over 60 years of confirmed sightings and strandings along the coasts of Namibia and South Africa to assess whether these animals are returning to their historical range. Researchers found that 95% of all observations recorded in that period have occurred since 2012, suggesting a notable increase in recent years. Antarctic blue whales remain critically endangered, with populations estimated at just 3% of pre-whaling levels, while fin whales are classified as vulnerable but are thought to have recovered to more than 30% of historical numbers. Scientists say the increase in sightings is consistent with a gradual population recovery, and the southeastern Atlantic may once again be serving as an important habitat for both species.

2️⃣ Why is this good news: After decades of near silence in the southeastern Atlantic, blue and fin whales are showing up with increasing frequency, which suggests their populations are slowly reclaiming parts of their historical range. Fin whale numbers have already recovered to more than 30% of historical levels and continue to grow at around 4 to 5% per year, while Antarctic blue whales are increasing at approximately 5 to 8% annually. Each new sighting in this region adds to a growing body of evidence that sustained protection can yield real results for even the most heavily hunted species. For ocean ecosystems, the return of large whales matters well beyond their populations alone, as these animals play a vital role in nutrient cycling and supporting overall marine health. The study also fills a major data gap for this region, giving scientists and conservationists a stronger foundation for protecting these whales as their recovery continues.

3️⃣ What’s next: Researchers recommend expanding passive acoustic monitoring and increasing trained observer coverage in commercial shipping and fishing sectors to better track the whales’ movements. Incorporating whale distribution data into marine spatial planning could help reduce threats from ship strikes and fishing gear entanglement. Continued and sustained protection will be essential, as both species remain vulnerable to human activities and climate-driven changes in ocean ecosystems.

Read the full story here: Good News Network – Increased Sightings of World’s Two Largest Whale Species Decimated By Hunting Provides New Hope for Survival