Freshwater crabs take shelter in woody debris in streams, which also provide an important habitat for other stream invertebrates and fish. Trees not only provide this woody debris, but they also create the shade that cools stream water, allowing the many temperature-sensitive invertebrates to survive.
Unlike marine crabs, young freshwater crabs hatch directly from the eggs carried under the folded tail of their mothers as with freshwater crayfish. They aredetritivores, feeding on both animal and vegetable material found in their habitat’s organic silt. They grow to around 10 mm in shell width.
Freshwater crabs are considered to be a threatened species.
Did you know? Freshwater crabs need to live in the shade in order to see because their wide, stalked eyes are too sensitive to deal with bright light.