In this article, I will examine why and how some animals have evolved to be transparent. Most of these transparent animals live in the open ocean – the pelagic zone. Most transparent aquatic animals’ bodies are filled with a jelly-like substance which is buoyant and provides resistance to the crushing pressures of deep water. 36 Transparent Animals That Are Hard To Believe Actually Exist. Scientists Make Living Mice’s Skin Transparent with Simple Food Dye.