While exploring a shallow creek, I spotted a European crayfish (Astacus astacus) slowly moving over the rocks. Its shell blended in perfectly with the riverbed, making it almost invisible. It's always ...

“I study leeches called branchiobdellidans that live on crayfish. These leeches are just millimetres long and are symbionts — meaning they live in a close, long-term association with their host. They ...

Joe Grantham is a contributor from the UK with a degree in Classical Studies. His love for gaming is only rivaled by a deep passion for medieval history, which often seeps into his articles. With over ...

Williams recognized the extremely rare bilateral color variation, a mutation he had previously read about in lobsters and observed in an American redstart bird. The class brought the crayfish back to ...

Williams said he believes the mutation was caused by two rare occurrences, the first being a developmental anomaly where the egg cell had two nuclei instead of one. That would mean it had two sets of ...

A 74-year-old man presents to the emergency department with a 1-day history of severe chest and back pain. He has a history of hypertension and has run out of medication. He has no history of similar ...

Mill Creek, the only home of the endangered Nashville crayfish, stands in the path of The Boring Company's proposed Music City Loop route connecting the city's airport to downtown. Beginning in ...

The Michigan Department of Natural Resources recently announced the discovery of an invasive species of crayfish at the Wolf Lake State Fish Hatchery in Mattawan. In places like Louisiana, the red ...

Invasive red swamp crayfish have infiltrated a west Michigan fish hatchery, the Michigan Department of Natural Resources said Thursday. The hatchery staff found two carcasses of "unusual crayfish" ...

The crayfish likely entered the hatchery through contaminated water or released pets. The DNR is working to contain the infestation and monitor nearby lakes. Red swamp crayfish are prohibited in ...

State officials on July 24 said an invasive crayfish species that has been found in several Michigan counties was discovered in a rearing pond at Wolf Lake State Fish Hatchery. The Michigan Department ...

MATTAWAN — The Michigan Department of Natural Resources has confirmed the presence of invasive red swamp crayfish in an outdoor muskellunge rearing pond at Wolf Lake State Fish Hatchery in Van Buren ...