Abiologist identifies an organism that lives in the gills of a fish and consumes the fishs blood. what type of relationship do the organism and the fish have

Ihave made a synthetic cell by placing a solution that is 10% sodium chloride inside a semipermeable membrane through which water can pass but not sodium chloride. if i place this cell into a solution that is 20% sodium chloride what will happen to the size of the cell? will it increase, decrease, or stay the same in size?