Many insects inhabit freshwater habitats.

• Daphnia ("water fleas") are microscopic crustaceans near the bottom of the food web.

• Water Boatman uses long rear legs as "oars" for swimming.

• Backswimmer also has "oars", but swims upside-down, and many have red eyes.

• Water Strider can walk on water, using wave vibrations for communication.