Crustaceans solitary are known to everybody. Because of their soft abdomen they need to protect their body in way to retract themselves into the house, allowing them to survive the adverse conditions. They simply use empty snail shells for that purpose. We can simply say, that sea real estate market is more vibrant than those on land: abandoned houses of sea snails do not stay empty for long, because the crabs inhabit which has grown more that is the size of his current home take available empty houses very quickly. Why not to make a visual imagination that we can simply be like crustaceans solitaries and take some empty “sea snail house” for us. Or go even further and take for us some shell, like conch shell, which shape is also very well known to everybody?