Introduction -- Using This Book Effectively -- General Techniques for Collecting and Identification.

General Ecology of Freshwater Invertebrates -- The Nature of Inland Water Habitats -- A Primer on Ecological Relationships among Freshwater Invertebrates.

Ecology and Identification of Specific Taxa -- Sponges: Phylum Porifera -- Hydra and Jellyfish: Phylum Cnidaria -- Flatworms: Phylum Platyhelminthes, Class Turbellaria -- Hairworms: Phylum Nematomorpha -- Snails: Phylum Mollusca, Class Gastropoda -- Mussels and Clams: Phylum Mollusca, Class Bivalvia -- Aquatic Segmented Worms and Leeches: Phylum Annelida -- Moss Animals: Phylum Ectoprocta, or Bryozoa -- Introduction to Freshwater Invertebrates in the Phylum Arthropoda -- Mites and Spiders: Subphylum Chelicerata, Class Arachnida -- Fairy Shrimp, Tadpole Shrimp, Clam Shrimp, and Water Fleas: Subphylum Crustacea, Class Branchiopoda -- Copepods, Fish Lice, and Seed Shrimp: Subphylum Crustacea, Classes Maxillopoda and Ostracoda -- Aquatic Sow Bugs, Scuds, and Opossum Shrimp: Subphylum Crustacea, Class Malacostraca, Superorder Peracarida -- Crayfish, Crabs, and Shrimp: Subphylum Crustacea, Class Malacostraca, Order Decapoda -- Introduction to Insects and their Near Relatives: Subphylum Hexapoda -- Mayflies: Insect Order Ephemeroptera -- Dragonflies and Damselflies: Insect Order Odonata -- Stoneflies: Insect Order Plecoptera -- True Bugs: Insect Order Hemiptera -- Hellgrammites, Spongillaflies, Caterpillars, and Others: Minor Aquatic Insect Orders -- Caddisflies: Insect Order Trichoptera -- Beetles: Insect Order Coleoptera -- Midges, Mosquitoes, Blackflies, and Other True Flies: Insect Order Diptera.