Everything about The Shasta Crayfish totally explained
The
Shasta crayfish (
Pacifastacus fortis), also known as the
placid crayfish, is an
endangered crayfish species
endemic to
California. It is found only in isolated spots on the
Pit and
Fall Rivers. It has always had a very small native range, and that range has been significantly fragmented by such human activities as damming, mining, and agriculture. To make matters worse, the
signal crayfish, a recently
introduced species, has very successfully outcompeted the Shasta crayfish in much of its range. The
Pit River Fish Hatchery was closed in order to protect this species. The animal requires a constant, steady, and untainted flow of fresh water to survive. Further steps in the recovery plan for the species are underway.
The Shasta crayfish is thick and stocky, with relatively heavy
chelae. It is usually dark brown dorsally with bright orange areas on its underside, but there's also a brilliant blue color morph. It is about 3
inches long. It lives in cold, clear, rocky areas of the mountain rivers and feeds on the slime coating the rocks.
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