The Shark Purse and Ray Purse identification guide below can come in handy for a few reasons, angling and general knowledge.
Finding various purses along a stretch of beach is not a perfect way to evaluate whether your target species is in the vicinity of your fishing mark. However it can help you reduce the marks you need to fish. The more you find around a geographical area the more likely the target species will be in the general area too.
Regardless its a good bit of general knowledge to have even when not fishing. It covers all Shark and ray purses found around the coast of the UK.
Hopefully this should help you identify the various Shark Purse or Rays Purse that you may come across.
Happy hunting and Tight lines