The lowly zebra fish can make its own sunscreen. Marrabbio2/Wikimedia Commons hide caption toggle caption Marrabbio2/Wikimedia Commons Shots - Health News Why Would A Fish Make Its Own Sunscreen? May 13, 2015 Research suggests that genes that make a natural sunscreen jumped from algae to an ancestor of vertebrates hundreds of millions of years ago. Some animals kept the ability. Others didn't.