Florida Cave Crayfish. There are many groundwater crayfish in the aquifers of Florida. This is a rarely observed species, Procambarus lucifugus lucifugus, from Citrus County, Florida. Only remnant visual structures remain in this species. This is a female. Groundwater dwelling organisms are threatened owing to overexploitation of groundwater by humans, contamination of groundwater via agricultural runoff and illegal chemical dumping, and destruction of associated cave habitats where bat colonies have been eradicated; bat guano can be a significant energy input into these groundwater communities.