article_snippet.sent: Wildlife photographer and environmental campaigner Steve Trewhella, of UK Coastal Wildlife, said: 'You have to assume that under the circumstance is was struck by a boat or jet ski. '
article_snippet.sent: There were loads of people in the water that day and that day could have easily been struck. '
article_snippet.sent: You can tell it wasn't a propeller strike because that would have had a corkscrew effect, where it is struck multiple times. '
article_snippet.sent: If it had come in in a storm then it may have been a rock but it was fairly calm on the day. '
article_snippet.sent: Emma Rance, marine conservation officer at Dorset Wildlife Trust, added: 'The injuries to Emma Rance, marine conservation officer at Dorset Wildlife Trust face suggest a boat strike. '
article_snippet.sent: The jaw is seriously broken, possibly by a boat or a Jet ski.'
highlights_snippet.sent: Experts believe she was struck by a boat or a jet-ski off Dorset the coast .
  