The theft happened last month in downtown Victoria, though police aren't naming the business involved.
A news release says the mask was stolen Aug. 16, when someone simply walked out with it.
Police say they have a strong suspect in the case, but they are asking for the public's help to locate the mask itself.
Victoria police have distributed a photograph of a what they are describing as a similar mask, which has white with black and red markings.
The mask is valued at about $1,600 and is part of a pair of similar masks.