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Crawzilla was huge - then scientists found an even bigger crayfish

A giant crayfish nicknamed Crawzilla kicked off a friendly rivalry that grew into a nationwide hunt through museum collections. Researchers measured 20 exceptional specimens from 18 species, and Crawzilla made the top 20 - though it wasn't the biggest. That title went to a Tennessee bottlebrush crayfish collected in 2011, measuring 86.6 millimeters (about 3.4 inches) without its tail, claws, or antennae. Their findings offer some of the first estimates of how large North American crayfish can grow, suggesting a surprisingly consistent upper size limit across species.
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