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An initial assessment revealed that the whale was underweight and had an abnormal amount of whale lice, suggesting she was suffering from some illness or lack of adequate nutrition, he said.

She was described as gaunt, with dark rings under her eyes and the worst case of head lice an expert had seen in her 30-year career.

Actress Jenny Mollen is itching to make sure everyone knows she didn’t realize she had head lice until she was already on her recent five-hour flight.

Wrasse fish are used to keep farmed species such as salmon free from sea lice and helps minimise the use of chemical treatments.

There are also long-standing concerns around parasitic sea lice and the use of chemical treatments in open waters.