Creature of th Sea

You were swimming in the ocean with your family or friends when you feel something bite you on your leg. You quickly swim back to shore and find that scales were growing around the bite mark. It didn't hurt much but your leg was starting to change... (You decide if what you were bit by was an escaped experiment fish or a creature of magic. Your family consists of your parents, 2 sisters, and 1 brother along with a family pet of your choice.)