The native crayfish community includes the federally and state-listed endangered Shasta crayfish, Pacifastacus fortis (Faxon, 1914) and the Branchiobdellida or crayfish worm, Magmatodrilus obscurus (Goodnight, 1940).  Magmatodrilus obscurus is shown on a rock to the right of center (© B. Moose Peterson, Wildlife Research Photography).
The native crayfish community includes the federally and state-listed endangered Shasta crayfish, Pacifastacus fortis (Faxon, 1914) and the Branchiobdellida or crayfish worm, Magmatodrilus obscurus (Goodnight, 1940). Magmatodrilus obscurus is shown on a rock to the right of center (© B. Moose Peterson, Wildlife Research Photography).

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