Riparian: There are 33 crustacean species found in the Colorado River and its tributaries within Grand Canyon National Park. Of these 33, 16 are considered true zooplankton organisms. Grand Canyon's crustacean species can be grouped into five major types: Calanoid copepods, Cyclopoid copepods, cladocerans, amphipods, and ostracods. The zooplankton crustaceans constitute a significant food source for larval rainbow trout, larval bluehead and flannelmouth suckers, as well as many benthic invertebrates.
Did You Know?
There are different river trip opportunities through Grand Canyon National Park, including professionally guided raft trips, available to the public and often reserved a year or two in advance; and self-guided, or "private" river trips, made available to the public through a weighted lottery. More...