Using an explosive, like a Cannon, on a dead whale will make it go directly to the next stage of bloating without the time required passing. Saving ad Quitting, then opening up the game again, will let you repeat the action, until the whale is ready to harvest.
Here's pics, so it did happen :
Steps to Reproduce
Use Cannon on dead Whale, watch it bloat more. Save and Quit. Continue the game again. Use Cannon again for the same effect, until it explodes.
This issue has not been confirmed by a developer yet.