What advantages and disadvantages do hermit crab and snail provide for each other?
Advantages:
With a shell, the hermit crab is safer from predators, or any
other threats. It is basically more protected.
The snails have less shells lying around because a hermit crab
is probably constantly looking for a new one.
Disadvantages:
The snail's shell is heavy on the hermit crab's back, so it
slows it down.
A hermit crab outgrows its shell and will have to find a new one
soon.
The snail has no disadvantages.
I hope I helped you! Sorry if this isn't what you were looking
for! :)