| To blend into their environment, some marine mammals have countershading. |
| We therefore report two experiments designed to test whether countershading enhances protection by diminishing the probability of detection by predators. |
| This link between environment and colouration is called countershading. |
| Demonstrating countershading, the turtle's underside is lightly colored. |
| The bacteria providing this ventral bioluminescent countershading, as it is called, glow with the colors of moonlight and starlight. |
| The countershading of bat rays, a form of camouflage, protects them from predators above and below. |
