Orcas vs. Whale Sharks: A New Apex Predator Dynamic

In this episode of the How to Protect the Ocean podcast, host Andrew Lewin discusses the fascinating behavior of orcas, particularly their recent predation on whale sharks, the largest fish in the ocean.

Orcas, known as apex predators, have been observed hunting whale sharks in the Gulf of California. This behavior was documented in a new study published in the journal Frontiers of Marine Science, which includes video footage and images of the attacks. The orcas target the whale sharks by striking their underbelly and grabbing their pectoral fins, aiming for the nutrient-rich liver, similar to their hunting strategies for great white sharks.

The study tracked four predation events over six years, highlighting a male orca named Moctezuma, who participated in three of these events alongside females from the same pod. This suggests that the orcas are learning and refining their hunting techniques over time.

Lewin emphasizes the importance of understanding this new predation behavior, as it indicates that whale sharks have a formidable predator. He also stresses the need for conservation efforts to protect whale sharks, which face threats from climate change, pollution, and fishing activities. The episode concludes with a call for further research and discussion on the implications of orcas hunting whale sharks and the overall health of marine ecosystems.

Link to article: https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2024.1448254/full#supplementary-material