Yes.
depending on the species both
fiddler crabs drink fresh water.
it is close to endangered
NO.
The primary difference between saltwater crabs and freshwater crabs lies in their physiological adaptations to their respective environments. Saltwater crabs have specialized gills that allow them to extract oxygen from the water, while freshwater crabs have modified gills that are better suited for extracting oxygen from air. Additionally, saltwater crabs have a higher tolerance for salinity levels, whereas freshwater crabs require a lower salinity environment to survive. These adaptations enable each type of crab to thrive in their specific habitat.
It is becoming less common but is not yet endangered.
No
No hermit crabs need distilled water for fresh water (which they drink), and need SEA salt water for them to bathe in (so the exoskeleton gets stronger)
crab
Usually at the bottom of the sea.... they are bottom-dwellers from saltiest water to the almost fresh water of the back bays.
Short answer: No! The Coconut Crab has become a sensation due to a picture of a giant crab climbing a trash can which is circulating on Facebook. Some comments claim the crab is delicious while others jot down that it is becoming endangered. This couldn't be further from the truth. The species is experiencing a population explosion and far from endangered. The meat of this crab is said to be sweet and lucious. Enjoy!
Fresh crab legs may feel slimy due to the presence of a thin layer of mucus that coats the shell to protect the crab's body. This mucus helps prevent the crab from drying out and protects it from bacteria and other contaminants in the water. Additionally, the sliminess may be attributed to the natural lubrication produced by the crab's body to aid in movement and protection.