Meet the Critters!

Learn more about common aquatic organisms found in Hawaii's streams. Use the dichotomous key to identify your organism and then compare it to the picture to see if you have a correct match!

Arthropods (Crustaceans)

Animals with segmented bodies, 4 or more pairs of legs, and lacking wings.

Arthropods (Insects)

Animals with segmented (jointed) bodies and 3 or less pairs of legs. May or may not have wings.

Molluscs (Clams and Snails)

Animals with shells covering or enclosing soft fleshy bodies and without legs.

Vertebrata (Fish)

Animals with apparent backbone and internal skeleton, usually with fins, no obvious appendages.