Slugs are basically snails without the shells. Their bodies are worm-like, Slugs include both marine and land species. Their soft, slimy bodies are prone to desiccation so they are confined to moist environments. Some are recognized as garden pests and can cause severe damage to both leafy vegetables and fruit. There are several methods to kill them, use Fertilome Eliminate, or Sluggo to rid your garden of these pests.