Graham Turner's Town, celebrating their 125th anniversary, needed a bright start and had a chance in the opening quarter of an hour. But Lionel Ainsworth's weak shot from 25 yards was saved easily by Torquay keeper Scott Bevan.
Bevan then had to react well to tip a mis-hit cross by Jermaine Grandison over his own bar.
Ainsworth then saw another tame effort held by Bevan. But, in truth, they rarely looked threatening and Torquay had a great chance to lead.
But on-loan striker Robinson, facing his parent club, failed to connect with Tomlin's cross from six yards out.
Zebroski then forced a good save and dragged a shot wide, either side of Mark Wright's ball across goal for Shrewsbury, which none of his team-mates managed to get on the end of.
Town were struggling to cause Bevan major problems, Ainsworth and Dave Davis both missing the target from outside the box.
Torquay looked more likely to add to their lead, Robinson forcing a save from Smith before Tomlin curled his effort just wide after a piece of trickery 18 yards out.
Grandison and Ian Sharps had shots easily saved and Bevan tipped Wroe's effort over as Shrewsbury's season ended with a whimper.
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