A spokesman said: “Attempts at capturing the swan at Askern were frustrated as the bird was disinterested in feeding.
"Alex and Dan returned with one of our rescue boats, and working with a local RSPCA inspector, managed to catch the swan.
"The animal is now settled at the sanctuary and will undergo seven days of treatment before being returned back to the wild.”
Pictures show the bird with a fish-shaped hook wedged around its eyes and beak. It is understood the bird had been in distress for a number of days before rescurers managed to pluck the bird from the water.