Nightcrawlers are a form of earthworm. Prized primarily for use as fishing bait, nightcrawlers are generally known as either Canadian or European (more often than not, "Belgium"). Canadian nightcrawlers are the larger of the two, measuring up to 14 inches when fully extended. Fishermen enjoy the Canadian worm more because of its size. It can be easily secured to a fishhook, and stays lively while submerged in water for up to 5 minutes. The Canadian nightcrawler is used for catching largemouth bass, trout, catfish, and other freshwater fish. One dilemma with the Canadian nightcrawler is that it will not survive in temperatures above about 65 °F. Therefore, bait shops must keep them refrigerated and attention must be keep to ensure that the worms are not left to rest in the hot sun while fishing. Harvesting Canadian nightcrawlers are harvested in certain locations in North Americ