Cnidarians are a group of aquatic invertebrates that includes jellyfish, corals, sea anemones and hydras. This profile explores basic facts about cnidarians including how they are classified, what they eat, where they live and the characteristics that make them different from other invertebrate groups.
Cnidarian characteristics include a gastrovascular cavity has only one opening, a mouth, through which the animal takes in food and releases waste. In this article, we'll learn about the characteristics of cnidarians and what makes them different from other types of invertebrates.
Pictures of cnidarians, including cnidarian photos such as bubble tip anemones, button polyp coral, jellyfish, hydrozoa and more.
The Life Cycle of a Jellyfish
The most recognized image of a jellyfish is that of the adult jellyfish, also called a medusa, with its bell-shaped body and long tentacles. But there is more to a jellyfish than a medusa.