Orcas Confirmed Predators of Great White Sharks in Australian Waters

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In a groundbreaking study, researchers have confirmed that orcas, or killer whales, actively prey on great white sharks in Australian waters. DNA analysis conducted on the carcass of a 4.7-meter great white shark, which washed ashore near Portland, Victoria, revealed that the shark had been attacked by orcas, including known individuals catalogued in the area.

The shark, discovered in October 2023, was missing its liver and several other internal organs, indicating a targeted predation event. The researchers identified distinctive bite wounds, one measuring 50 centimeters in diameter, linked to the killer whales' attack. This incident marks the first confirmed evidence of orca predation on great white sharks in Australia, previously observed only in South Africa.

Lead author Isabella Reeves from Flinders University emphasized the importance of understanding the dietary habits of orcas, as they play a crucial role in the marine ecosystem. Orcas are known to hunt a variety of species and have been recorded selectively consuming specific organs, including shark livers.

Marine scientists warn that this predatory behavior could have significant implications for great white shark populations and ecosystem dynamics, as the interaction between the two top predators changes the balance of marine life.

Researchers encourage further investigation into these interactions to better understand their impact and to help in the conservation of both killer whales and great white sharks.

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