Fish
Procambarus clarkii
S tier
Procambarus clarkii, the red swamp crayfish, is the workhorse of Louisiana crawfish country and a widely farmed species worldwide. Shells run deep red when cooked; meat is sweet with a slight earthiness when the animals are not purged. Claws are useful but the tail is the main yield. It thrives in warm ponds and rice-field culture, which is why frozen tails from Asia and the Gulf appear year-round. Use for étouffée, spicy boils with corn and potato, or garlic-butter sautés. Live product should be active; discard dead animals before the pot. Because the species is invasive in many regions outside its native range, buy farmed stock from legitimate suppliers and never release live animals into local waterways.
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History
The red swamp crayfish was described scientifically and later tracked across North American freshwater habitats.
Louisiana commercial harvest and pond culture built a dedicated crawfish industry around P. clarkii.
Asian and European aquaculture adopted red swamp crayfish for export tail meat and live trade.
Chinese spicy crayfish restaurants made P. clarkii a global night-market and delivery favourite.