Dive in the water to find some item;submergend boats in the watter with some items;door;fish;strange plants;islnads;octopus;underwater caves;repair the shadow to see all body;animations for example:jump in the water,dive,etc;decoration for example:bed,chair,table;flashlights/torch for the night and a story for know how the man/girl reached to survive on the ocean.
Sorry for my english if i write wrong somewhere.