Grand Canyon National Park Crustaceans

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.

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Featured Park
Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.
Featured Wildlife
The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.
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