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.
See the best and worst foods that can affect your sleep so you can get to sleep faster and stop insomnia. Here's what to eat (and not to eat) before bed for a good night's sleep. See the best and worst foods that can affect your sleep so you can get to sleep faster and stop insomnia.