Here's the whole animal (click on the images to enlarge them),
It is, or rather was, a fin whale*. It has been floating in the English Channel for a few days and was washed up yesterday, just south of the Langstone Rock at Dawlish Warren - half a mile from my flat.
The joint winners are
Kakapo and
kiang. Neither hit the bullseye, but it was a difficult question and their answers were very close. Well done both of you.
On average 2 or 3 fin whales are stranded or washed up on British coasts each year, so this is quite an unusual event. This whale was initially reported as a sperm whale, but it is obviously a rorqual from these throat pleats. the identification as a fin whale comes from the white right-hand side to its throat (its starboard bow one might say) and the white and grey baleen in its right upper jaw.
The fin whale is remarkable because the left-hand side of the throat and the left baleen are grey. I can't think of any other mammal with such asymmetrical colouration. The whale was female and about 50 feet (16 m) long, which means that it was immature.
A sad sight, but a very interesting one. I would love to see a living fin whale.
Alan
* or finback (for bongorob

)