Rose Byrne about the odyssey of a pufferfish. Images and references include large fish eating smaller ones, sea creatures' venomous attacks, and species camouflaging themselves to deceive prey. Language includes the words "monstrous," "poisonous," and "toxic" to describe characteristics of a number of ocean species. There are also discussions about marine life reproductive systems involving eggs, sperm, and mass spawnings, as well as the topic of coral reefs dying due to warming water temperatures. The documentary's positive messages include the importance of ocean conservation, the drive and determination to overcome life's obstacles, and the integral role people and marine life share in the Earth's ecosystem.