Slugs

Believe it or not slug's slime has a purpose. They use it to suction power and to travel upside down and up trees and other vertical surfaces. They leave a slime trail behind them as they move. When in danger the slug will let out a thick mucus coating and make their body shorter and fatter. This makes it difficult to eat them and gives them a coating with an unpleasant taste to potential predators. Slugs can fit into almost any space due to their ability to become very long and thin or short and fat. Their slime helps them fit through tight areas. They can avoid sunlight by crawling into small crevices and holes. Their slime also helps keep water in their bodies an important factor in their survival. Slugs actually are very interesting.