Some of the turtles had fish swimming under their shells as well as on top of their shells. (aweekatthebeach.com)
Once it was ready to go in the oven I also «sprinkled» more of the mozzarella cheese on top of the shells before covering with the tin foil (couldn't resist). (forkknifeswoon.com)
Once the oven is heated, remove the sheet from the refrigerator and place a silicon baking mat (preferred because of its weight) or another sheet of parchment over top of the shells. (healthygreenkitchen.com)