A basking shark satellite tag is still missing off the north coast of the Island.
The Manx Basking Shark Watch attached the device, worth £2000, on Wednesday, but if has since come off.
The charity has upped the reward fund for finding the tag to £200.
It is still floating 7-10 kilometres off-shore.
It is a similar shape to an ice-cream cone and has a red top about the size of a tennis ball.
Wind farm debate to continue before committee
Meeting held on Monday garnered mixed opinions
Call for compensation scheme for workers who become ill after contact with asbestos
The legislation would mirror a scheme operating in the UK
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James Fenton met Charles III on his first visit as Lord of Mann
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Chair Hannah Mackenzie says repeating procedure in best interests of residents
