Dear Mr Bugman,
I live in Cyprus (south west area) yesterday whilst cleaning the swimming pool, the attached was found dead in the bottom, I have tried to find out information, unsuccessfully, so at this point I am asking for your help in identifying the above, also any possibly explanation as to how it would have ended up where it did, there is no damage on it at all. I look forward to receiving your answer on this matter. Thanks for your assistance.
This appears to be an Oleander Hawk Moth Caterpillar, Deilephila nerii or Daphnis nerii. If you have an oleander shrub nearby, the caterpillar probably left the shrub to pupate. Pupation occurs occurs underground. Many caterpillars change color just before pupation, which would explain the pink color.