some defeneses against crabs would be camoflouge, hide away, and limb autotomy
lymph
All living things have defenses, yes.
Some types of crabs I know of are fiddler crabs, hermit crabs and horseshoe crabs.
yes they do have defenses against enemies
some of lions defenses are their pride!
Cacti have their spines that keep animals from resting and eating their fruit
Resistance.
Their quills.
They don't have any.
Non specific defenses against pathogens include intact skin, temperature, neutophils, macrophages, and natural kills cells.
Deserts and Mountains
No,of course.............