how long does a common garden snail live
Land snail Most species of land snail are annual, others are known to live 2 or 3 years,[14][15] but some of the larger species may live over 10 years in the wild.[16] For instance, 10-year old individuals of the Roman snail Helix pomatia are probably not uncommon in natural populations.[17] Populations of some threatened species may be dependent on a pool of such long-lived adults.[18] In captivity, the lifespan of snails can be much longer than in the wild, for instance up to 25 years in H. pomatia.[19]
Hermit crab Most species have long, spirally curved abdomens, which are soft, unlike the hard, calcified abdomens seen in related crustaceans. The vulnerable abdomen is protected from predators by a salvaged empty seashell carried by the hermit crab, into which its whole body can retract.[3] Most frequently, hermit crabs use the shells of sea snails (although the shells of bivalves and scaphopods and even hollow pieces of wood and stone are used by some species).[4] The tip of the hermit crab's abdomen is adapted to clasp strongly onto the columella of the snail shell.[5] Most hermit crabs are nocturnal.