Fish are animals that live in water and breathe through their gills. Gills are like underwater lungs. They have scaly skin that helps them to move through the water and fins that help them swim.

What types of animals have been to space ... Small insects such as mosquitoes don’t fly, but rather swim through the air, so in turbulence they’re tossed all over. In rain most of them ...

These marine environments have the characteristics of other cave types, including enclosed spaces ... eyes become of little use. Many cave animals have lost their eyes through evolution. Instead they ...