Ctenophora, commonly known as comb jellies, are a phylum of marine invertebrates characterized by their gelatinous bodies and unique locomotion. They possess rows of tiny, hair-like structures called cilia that beat in unison, allowing them to glide through the water. Ctenophores are mostly transparent and can be found in oceans worldwide, from surface waters to deep sea environments. These creatures are primarily carnivorous, feeding on small plankton and other tiny marine organisms. Some species have specialized cells called colloblasts that help capture prey by releasing a sticky substance. Ctenophora play an important role in marine ecosystems as both predators and prey.