Symbiotic associations w/crabs or snail shells occupied by hermit crabs, may provide protection from predators of hosts, which give organisms a free ride.
(snail shells; occupied; by hermit crabs) (Symbiotic associations w/crabs or snail shells; may provide; protection from predators of hosts) (hosts; give; organisms; a free ride)
snail shells Symbiotic associations w/crabs or snail shells hosts
occupied may provide give
by hermit crabs
protection from predators of hosts
organisms a free ride