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Add Yahoo as a preferred source to see more of our stories on Google. The super invasive rusty crayfish, sometimes called a gladiator, has been slowly taking over several waterways in Pennsylvania.

Rusty crayfish have taken over the Lower Susquehanna River. Non-native, invasive crayfish are spreading through streams, rivers, lakes and ponds across Pennsylvania, replacing native species and ...

Most Pennsylvanians have probably crossed paths with crayfish. These clawed crustaceans are routinely caught by country kids playing in creeks, used by fishermen as bass bait and served as a main ...

These crayfish are larger, more aggressive, and reproduce more quickly than native species, leading them to dominate ecosystems and disrupt food webs. Rusty crayfish have a significant impact on ...

A species of crayfish that’s estimated to have a population of less than 1,000 in Pennsylvania is under state review regarding its future. In Pennsylvania, the digger crayfish is only found in the ...