The photos, taken by a reporter from The Mail on Saturday, February 21, show the dead mammal on Roanhead Beach with visible injuries.
Advice from the North West Wildlife Trusts states that members of the public should avoid interacting with any such animal if seen in a similar situation, but that reporting the sighting is essential.
Sightings should be reported to the relevant bodies (Image: NQ)
A spokesperson said: “Information collected from dead stranded animals is vital to our understanding of marine life and helps us work to improve marine wildlife protection.
“Dead strandings can help us learn about marine animals’ diet, health and disease, the effects of pollution and bycatch, distribution, and specific threats that they face.
“Avoid touching the animal and always make sure to wash your hands if any contact is made; dead marine animals, like any other animal, can carry disease or infection.”
In England and Wales, sightings of a dead cetacean such as a porpoise can be reported to the Cetacean Strandings Investigation Programme (CSIP) on 0800 652 0333.