Quick-fill inflatable water craft

An inflatable watercraft for supporting a user on water, comprising:

• a flexible water-proof bladder having a first end, an opposing second end, a top side, a bottom side, and two opposing lateral sides, the bladder assuming a watercraft form when inflated with air, at least one third of the first end open to expose an interior surface of the bladder and an interior volume of the bladder;
• and
• a first seal fixed with the interior surface of the bladder proximate the open first end of the bladder, the first seal having a resilient top seal strip fixed with the interior surface of the top side of the bladder proximate the open first end of the bladder and an opposing resilient bottom seal strip fixed with the interior surface of the bottom side of the bladder proximate the open first end of the bladder, the top and bottom seal strips resiliently urged together in parallel alignment at substantially flat contact surfaces thereof to seal the first end of the bladder, the contact surfaces of the top and bottom seal strips including a tacky, or otherwise sufficiently sticky, material for temporary mutual adhesion between the contact surfaces, the first seal configured for assuming an open configuration and a closed configuration;
• whereby to inflate the watercraft the user holds the first seal open while scooping air into the bladder until the bladder is sufficiently inflated, whereupon the user closes the first seal to form the inflated watercraft.