Cnidaria
Jellyfish (Medusozoa) are unique to our park because this park has many rivers and lakes to live in. Cnidaria are free-swimming marine animals with a gelatinous umbrella-shaped bell and trailing tentacles. They are cup shaped.
Platyhelminthes
Flatworms (Platyhelminthes) are unique to Olympic Park because the worm only grows in forested areas, and the park has lots of forested areas. Platyhelminthes are bilaterally symmetrical and reproduce with a mate. The class, Turbellaria, is characterized by having a soft epidermis that is ciliated, at least on the ventral surface.
Annelida
Exogone Lourei are unique to our park because they are found in the lakes and creeks. Annelida are bilaterally symmetrical and vermiform. It has a true closed circulatory system.
Mollusca
Pacific Giant Oyster (Crassostrea gigas) are unique to Olympic National Park because it is only found on the peninsulas that surround the Northern Pacific Ocean. Mollusca live in freshwater and terrestrial habitats. The class, Bivalvia, is characterized by having laterally compressed bodies enclosed by a shell consisting of two hinged parts.
Crustacea
Green crab (Carcinus maenas) are unique to our park because it lives on the Washington Peninsula, which the park covers. Anthropoda are jointed- foot invertebrates. The class, Malacostraca, is characterized by having two pairs of antenna-like legs near its mouth that act like jaws.
Arachnida
Scorpions (Scorpiones) are unique to our park because the park has diverse environments that allows different scorpions to be born. Arthropoda are jointed-food invertebrates, and Arachnida have eight legs.
Insecta
Banana Slug (Ariolimax) are unique to our park because they only live in forests. Mollusca live in freshwater and terrestrial habitats. They also have a mantle used for breathing, the presence of a radula, and a nervous system. Gastropoda is characterized by having either one or no shell; it may also have an internal shell made of protein.
Echinodermata
Starfish (Asteroidea) are unique to the park because it has rivers and lakes, in which the starfish are found. Echinodermata are recognizable by their (usually five-point) radial symmetry. Asteroidea have no sharp demarcation between arms and central body. They move using tube feet.
Porifera
There are no Porifera in Olympic Park because it does not have the right conditions for Porifera to live in. Porifera have bodies full of pores and channels allowing water to circulate through them.