3. They use their arms around their mouth to help sense and find food that ends up inside their mouth. What they do have is a mouth, tentacles, and arms around their mouth. A group of jellyfish are called blooms, swarms or smacks. Crown Jellyfish: This jelly fish is famous for its 30 spikes that come out from its broad circular bell. Each of these oral arms has thousands of tiny mouths as opposed to a single oral orifice. By Andrea Thompson 01 April 2007. They predate dinosaurs. They use these mouths to eat and feed. Jellyfish have a potty mouth. Jellyfish, however, do not have an anus. Then, the food is trapped in the gastrovascular cavity and the nutrients are absorbed by the gastrodermis. * Jellyfish do not have a specialized digestive system. They trap food in their tentacles and then move it to their mouth. 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. After reading that, you should know that they do have mouths. Food goes into the Jellyfish through the mouth which is found in the middle of the bell. The food is placed in the hole, which is the mouth using the tentacles. These nematocysts shock the prey, allowing the tentacles to latch onto the prey and insert it in their mouth. Blue jellies are among the species of jellyfish that do not have to rely entirely … Jellyfish have a mouth that they place food into. This is a hole that is found underneath the body. Jellyfish have been around for millions of years. The tentacles push the food through the mouth. The hole might be favorable when they feed on small fish or it might be too small to feed on big dead prey. When a jellyfish is near a small invertebrate or something which is about to fall prey, the cnidocytes send nematocysts at the prey. The crown jellyfish can grow up to 24 inches and usually prefers to live in Indo-pacific ocean regions. Jellyfish have mouths. 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. Jellyfish Have Human-Like Eyes. The waste products also leave through the mouth. 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. Watch Corals Form a ‘Wall of Mouths’ to Catch and Eat Jellyfish. 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). When your mouth is tiny, teamwork can help to take down enormous prey. 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. 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