The couple covered the large lump in a scarf and brought it home after reading about the highly sought-after substance in a newspaper.
Gary, 48, afterwards put the lump on his fishing scales and determined it weighed 1.57kg, which is little over half the size of a lump found several years ago near Morecambe.
The previous piece of “whale vomit” had a startling 2013 value of £120,000.
Gary and Angela, a 49-year-old nurse, are currently in discussions with prospective purchasers regarding the lump that was recently discovered. The stone is somewhat smaller than a rugby ball.