Sally Butler, chairwoman of the Friends of Horsey Seals charity, said members of the public helped to stretcher Doughnut off the beach.
“It’s very rare for us to attempt a rescue at this time of year – with so many heavily pregnant seals around, it wouldn’t be right for us to disturb them and cause them stress,” she said.
“But we were doubtful as to whether Doughnut would survive until the end of the pupping season, so we decided to attempt a rescue even though she wasn’t close to the water’s edge.”
She added that the team was also aware of other entangled seals in the colony and hoped to try to rescue them too.
East Winch wildlife centre said the number of such incidents had risen heavily and it had cared for 104 seals with necklace-type injuries since 2008, when it started keeping records.
Nine of those seals had died, but the centre had rehabilitated and released 95 back into the wild.
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