Sophie discusses how plants and animals need to compete in order to survive and the role that adaptations play in their ability to survive. She explains how several animals and bugs have adapted to become better suited to surviving in city environments.
Bill Nye introduces reptiles and explains how they are able to live in different environments around the world by regulating their own body temperature. As cold-blooded organisms, they don't keep the same body temperature throughout the day.
Dory drops the scubadiving goggles that she and Marlin found, and they swim to the abyss to find them. In the darkness, they find a light emitted from an anglerfish, which attempts to prey on them. Marlin distracts the anglerfish and directs its light to the goggles so that Dory can read the address on them.
When Phoebe states that she doesn't believe in evolution, Ross tries to convince her that it is a fact through examples and scientific proof. Phoebe offers a counterargument using several examples in history when the brightest minds believed in a theory but found it to be incorrect.