The hole might be favorable when they feed on small fish or it might be too small to feed on big dead prey. Jellyfish have a mouth that they place food into. Blue jellies are among the species of jellyfish that do not have to rely entirely … The waste products also leave through the mouth. They have eight stout mouths and another 100 long pointed appendages that spring out from its pinkish-purple stomach. They tend to rely on the current of the water and the wind to help them find food. These nematocysts shock the prey, allowing the tentacles to latch onto the prey and insert it in their mouth. True Jellyfish have an incomplete digestive system, which means that they do not have organs such as liver, pancreas, and intestines to help in digestion of the food. Each of these oral arms has thousands of tiny mouths as opposed to a single oral orifice. They are carnivorous (meat-eating), and they are also opportunistic predators (they eat whatever they happen to come across as opposed to ambushing or actively pursuing their prey). Shares. When a jellyfish is near a small invertebrate or something which is about to fall prey, the cnidocytes send nematocysts at the prey. Jellyfish have a potty mouth. They predate dinosaurs. Jellyfish have been around for millions of years. They use their arms around their mouth to help sense and find food that ends up inside their mouth. Jellyfish have mouths. After reading that, you should know that they do have mouths. This is a hole that is found underneath the body. Then, the food is trapped in the gastrovascular cavity and the nutrients are absorbed by the gastrodermis. Jellyfish don't have an obvious mouth (or anus, for that matter) and it is hard to imagine where a digestive system might be within their small, transparent bodies. * Jellyfish do not have a specialized digestive system. By Andrea Thompson 01 April 2007. While the spotted jellyfish have small mouths on their arms, the main mouths of jellyfish are found in the center of their bodies. Their bodies aren’t very complex but they do have a stomach and intestines. Jellyfish Have Human-Like Eyes. 3. Although blue jellies have eight oral arms, other related species within this order only have three or four. 4. Watch Corals Form a ‘Wall of Mouths’ to Catch and Eat Jellyfish. Jellyfish, however, do not have an anus. The food is placed in the hole, which is the mouth using the tentacles. Jellyfish will eat any living thing that is small enough to fit into their mouths (and most pet jellyfish are typically fed brine shrimp). A large bloom can have over 100,000 jellyfish! What they do have is a mouth, tentacles, and arms around their mouth. The crown jellyfish can grow up to 24 inches and usually prefers to live in Indo-pacific ocean regions. When your mouth is tiny, teamwork can help to take down enormous prey. 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