Parents need to know that some of the animals shown are creepy looking, with big teeth, spines, spikes, or odd shapes. Also, animals are not to scale, so some appear huge when, in fact, they may be small. (Or vice versa.) The language is heavy at times, and parents may find themselves explaining words along the way to make it more accessible for younger audiences (for instance, water pressure, bioluminescence, and hydrothermal vents). Many different units of measurement are used, including feet, meters, miles, kilometers, Celsius, Fahrenheit, kilograms, pounds, etc.
Positive messages:The book encourages kids to be curious about the world around them.
Violence:A few illustrations depict animals eating other animals, but they aren't graphic. Behaviors of predation and defense are described.
I especially love the graph on the side of each two-page spread. It's amazing to see how little of the ocean we know! I'm always amazed by the illustrations put together by Steve Jenkins.