Underwater world

Photographs and simple text describe the various types of sea horses, where they live, how and what they eat, and efforts to protect their species.

Describes the bodies, growth, reproduction, relatives, neighbors, habitat, diet, and predators of sea sponges.

Describes the bodies, growth, relatives, neighbors, habitat, diet, defenses, and predators of octopuses.

Describes the bodies, growth, behavior, hunting tactics, and predators of swordfish.

Describes the bodies, growth, relatives, habitat, diet, and predators of sea sponges.

Describes the bodies, growth, relatives, neighbors, habitat, diet, and predators of shrimp.

Describes the bodies, growth, reproduction, relatives, neighbors, habitat, and diet of corals, as well as threats to their survival.

Describes the bodies, growth, behavior, relatives, habitat, and diet of piranhas, as well as threats to their survival.