This weird question is inspired by this book:

Due to the ocean floor being deep and dark, many animals have evolved to survive in their surroundings. Some animals take the proactive stance, undergoing bioluminescence to draw prey towards them. Other animals employ a more defensive approach, stinging their enemies with venom or spiky fins, protecting themselves in the process.

So, how have you evolved to manage your surroundings? What coping mechanism have you honed?