From section 13, British Columbia Sport Fishing Regulations:
Possession
13. (1) No person shall possess more fish of a species, other than halibut, except at the person’s ordinary residence, than twice the daily quota for fish of that species prescribed by these Regulations.
The British Columbia Sport Fishing Regulations state that you may possess only twice the daily limit of all species (except halibut, as set out in the Tidal Waters Sport Fishing Licence). This possession limit applies per person whether you or someone else caught the fish.
Fish caught by an angler that is being prepared, cooked, or is partially consumed away from the angler's ordinary residence ( i.e. while staying at a camp ground, overnighting on a boat, residing at a hotel, etc.) is included as part of the fisher's possession limit. The head and tail of all finfish and the carapace (shell) of any crab caught must be retained until the fish has been consumed.
You may transport another person’s sport caught fish, provided that the total of all fish possessed does not exceed your personal possession limit for each individual species prescribed by regulation or by licence condition.