Typical costs: 1  Replacing aging, leaking or inadequate ductwork typically costs about $35-$55 a linear foot for labor and materials, or $1,000-$5,000 or more for a single-family home, depending on the length and type of ducts used (sheet metal, fiberduct or round flexible ductwork) and local rates.
Not Veterinary Advice: No. A snail is not meant to shed or molt its shell and snails normally will not shed their shells. However, it can happen by accident, which usually leads to the snail dying.It's thought to be possible that some snails could live without their shells, until they form a new one, but this is considered unlikely.Snails are unable to reattach to their shells if they become separated, but it may still be possible for them to use the shell as shelter temporarily.owever, it can happen by accident, which usually leads to the snail dying. It's thought to be possible that some snails could live without their shells, until they form a new one, but this is considered unlikely.
There are many thousands of species of sea snails and sea slugs, as well as freshwater snails, freshwater limpets, land snails and land slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number.The fossil history of this class goes back to the Late Cambrian.There are 611 families of gastropods known, of which 202 are extinct and appear only in the fossil record.ome of the more familiar and better-known gastropods are terrestrial gastropods (the land snails and slugs) and some live in freshwater, but more than two thirds of all named species live in a marine environment.