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Great white sharks are disappearing from South Africa – and killer whales are to blame Science News



Great whites are considered the ultimate predator of the ocean. They can reach sizes over six meters and have more than 300 serrated teeth in their mouths. The depth giants can travel at speeds of over 50 kilometers per hour and can feel a minute’s movement from the prey of 250 meters.

All of the above suggests that there is nothing more terrifying than great white sharks in the oceans, but something is killing them off the coast of South Africa, experts say.

Since 2017, cage diving operators have seen a sharp decline in large white sightings.

In 2018 there were 50 observations, and in 2019 there were none.

Illegal hunting and human activity were thought to be the cause of the decline in large whites, but scientists now believe there is another explanation.

Killer whales or killer whales were first spotted in South Africa in 201

5, and a team of nine experts believe they are responsible for the extinction of the great whites.

South Africa relies on great white sharks for its tourism industry.

As a result, the government convened an emergency meeting on their disappearance.

A statement from the South African Department of Environment, Forestry and Fisheries said: “This day is significant because it serves as an annual reminder of how South Africa is blessed with a wide variety of fishery resources, but also that we manage sustainably and adequately protect the ecosystems that hide these finite resources.

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The researchers said at the meeting that “they have found evidence of a causal link between the appearance of a killer whale pod that specializes in white shark victims.”

In 2017, the remains of five great whites were found near the Hansbaai area, which are in line with the killer whale attacks.

One of the team, marine biologist Alison Cock, said that when killer whales appear, sharks tend to die.

She said during the presentation: “Every time this happened, there was an immediate fall and a gap when white sharks were spotted.”

However, she acknowledged that “we do not yet have all the answers”.




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