I like to free dive with snorkel and mask, and often find crayfish, which I’ve caught many times by hand (though I usually let them go). I find crayfish delicious, so I did a little research on the methods the California Indians used to catch and eat them.
Freshwater crayfish were eaten by the Indians of Northwestern California. The Yurok Sometimes caught crayfish by fastening a piece of salmon onto the end of a string tied to a pole. This bait was set in the water and when the crayfish grabbed it, they were pulled in. Instead of salmon, sometimes a ball of grass was attached, to which the claws or legs of the crayfish were entangled as they were pulled out of the water. The Karok used this method but with salmon gills as bait.
The Karok trapped crayfish by tying salmon gills above or in a basket that was set beside or under a rock, then lifting the basket out when the crayfish were feeding on the bait. Another Karok trap was a large, openwork, plate-shaped basket, with a four-foot stick attached to the center to keep the basket horizontal when lowered into a still place in the river. Salmon gills were placed on the basket as bait. Once the crayfish were lured onto the basket, it was lifted out quickly.

Shasta crayfish (Pacifastacus fortis), the only remaining native crayfish in California, is critically endangered. It’s endemic to Shasta County, where, before widespread environmental damage, it was caught by the Shasta Indians. Most crayfish in CA now are the introduced, invasive, signal crayfish (P. leniusculus).
The Shasta caught crayfish using the same type of trap, except instead of the four-foot stick, several strings were attached to the basket’s edges, and a stone was laid on it with the bait to weigh it down. This trap was used in about four feet of water in the evening. After 10-15 minutes, it was gently pulled to the surface.
Often, crayfish were simply caught by hand by the Yurok and Karok at the water’s edge. The Tolowa caught them by hand under rocks in streams while people were swimming.
The Karok roasted crayfish in ashes or hot coals till they were deep red. The Tolowa cooked them in ashes or in an earth oven. The Shasta boiled them in a basket with hot rocks.
REFERENCE:
Kroeber, A. L. and S. A. Barrett. 1960. Fishing among the Indians of Northwestern California. Anthropological Records 21(1):1-210. University of California Press, Berkeley, CA.