Syrena tried to pull herself out as the vines began to form around her. "Help! Loki!", she called to him again as the vine around her tail held her in place while it formed into a cage. She finally saw him approach her as he swam quickly to her. As she felt the water around her become colder, she noticed his skin change. The coldness of the water was actually useful for the mermaids, concluding that they were naturally afraid and weak from fire or any kind of warmth. This is typically why the mermaids don't sit on the rocks at the surface for a long time. If they were partially in the water, but not enough in the water to live, they can dry out and die. The weed began to weaken as she reached out her pale arm for him to pull her.