Describes the physical characteristics, habitat, behavior, diet, and life cycles of different microscopic creatures found in the ocean and includes information on bacteria, hydrothermal vents, and plankton.

Includes index.

Invisible oceans -- The ocean web -- Ocean bacteria -- Life in the deep -- Cyanobacteria -- All about algae -- Amazing phytoplankton -- Zooplankton -- Crustaceans -- Micromollusks -- Protozoa -- Larvae -- Size and scale -- About microscopes -- Micro-detective.