A lungfish is a remarkable type of fish that can breathe air using lungs, just like you do. While most fish can only breathe underwater using gills, lungfish have both gills and lungs, which lets them survive in conditions that would kill ordinary fish.

This unusual ability matters most during droughts. When rivers and swamps dry up in parts of Africa, Australia, and South America where lungfish live, these creatures burrow into the mud and breathe air through a small hole until the rains return. Some African lungfish can survive this way for years, essentially sleeping in a muddy cocoon and taking occasional breaths while waiting for water to come back.

Scientists consider lungfish fascinating because they represent an ancient bridge between water-dwelling and land-dwelling animals. Their ancestors lived over 400 million years ago, and studying them helps us understand how the first animals made the transition from water to land. The lungfish's ability to breathe air was likely a crucial step in that epic journey, showing how having lungs when gills won't work can make the difference between extinction and survival.