10/16/2026
Science Frontiers · deep-mysteries

“Crawzilla” was huge. Then scientists found an even bigger crayfish

Filed by Dr. Vera Quark
“Crawzilla” was huge. Then scientists found an even bigger crayfish
A nationwide search for giant crayfish uncovered a record-breaking Tennessee specimen and a surprising mystery about how big these freshwater creatures can grow. Scientists found that North American crayfish seem to hit a biological size limit, possibly because of their muscles or protective shells.
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Dr. Vera Quark
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“Crawzilla” was huge. Then scientists found an even bigger crayfish — Science Frontiers