Nope. Land hermit crabs in the wild travel in groups of thousands. They are exposed to different crabs every second; their should be no problem introducing a new one. (Make sure they're the same size though, otherwise the smaller one will be killed.)
not really but you can if your careful
no but you are really not smart if you think they do
A lot
No, Hermit Crabs are omnivores.
then get them! in fact, PLEASE do!! they love company and will become depressed if they don't have any. make sure to have a 10-gallon tank for two crabs though~
Yes hermit crabs have antennas.
fish and bigger hermit crabs
No hermit crabs are small and friendly
not really. the bigger the better.
Not really, they are more of an orange color.
sea birds, fish, octopuses, crabs, and other hermit crabs
Yes, hermit crabs can be kept as pets. You can get the cages in about every store along the beach. One warning though; they really stink!.