Doctor Andrew Brownlow, who carried out an autopsy on the whale, admitted he was not sure how the mammal came to swim up the Solway but concluded it might have simply been lost.
The juvenile male may have been following a shoal of fish or other food source and become disorientated.
The Fin Whale normally lives in the mid Atlantic.
The species spends the summer near the Arctic but comes further south in the winter.
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The Met Office have issued a warning for snow showers and icy strectches from Saturday evening until 10 am Monday
Kerrie Gosney brings you Saturday night's forecast
Severe gales possible for a time north of the border overnight. A cold, raw wind sets in Sunday. Showers turning wintry Monday & Tuesday.