Cnidarians (Cnidaria) are a group of aquatic animals that includes jellyfish, corals, sea anemones, and hydras. The basic form of the cnidarian body is quite simple and consists of a gastrovascular cavity with a single opening through which food is ingested and waste is released.he body wall of cnidarians consists of an outer layer or epidermis, an inner layer or gastrodermis, and a middle layer or mesoglea. Cnidarians lack organs and posses a primitive nervous system known as a neural net.
14. Fish. The Vitamin B6 in many types of fish will help your body produce melatonin, without the need to take melatonin supplements. Some of the best types of fish to consume for better sleep are salmon and halibut, and there are other foods you can choose that also feature B6.
In addition, including calcium in what you eat and drink before bedtime improves your body's absorption of tryptophan and melatonin production. Therefore the combination of foods high in carbohydrates, containing a small amount of protein, and including calcium results in the most beneficial sleep inducing foods.oods that Keep You Awake. While there are a number of helpful sleep inducing foods, there are also several foods and drinks that can keep you awake at night. If you're trying to improve your sleep, you need to stay away from the following. 1  Heavy, spicy foods such as chili or curries.