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. They trap food in their tentacles and then move it to their mouth. Jellyfish will eat any living thing that is small enough to fit into their mouths (and most pet jellyfish are typically fed brine shrimp). Food goes into the Jellyfish through the mouth which is found in the middle of the bell. These nematocysts shock the prey, allowing the tentacles to latch onto the prey and insert it in their mouth. They have eight stout mouths and another 100 long pointed appendages that spring out from its pinkish-purple stomach. The tentacles push the food through the 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. The waste products also leave through the mouth. 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). Jellyfish, however, do not have an anus. They use these mouths to eat and feed. While the spotted jellyfish have small mouths on their arms, the main mouths of jellyfish are found in the center of their bodies. Each of these oral arms has thousands of tiny mouths as opposed to a single oral orifice. Jellyfish have a potty mouth. The crown jellyfish can grow up to 24 inches and usually prefers to live in Indo-pacific ocean regions. * Jellyfish do not have a specialized digestive system. When a jellyfish is near a small invertebrate or something which is about to fall prey, the cnidocytes send nematocysts at the prey. Crown Jellyfish: This jelly fish is famous for its 30 spikes that come out from its broad circular bell. Their bodies aren’t very complex but they do have a stomach and intestines. 3. A large bloom can have over 100,000 jellyfish! 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 Have Human-Like Eyes. Then, the food is trapped in the gastrovascular cavity and the nutrients are absorbed by the gastrodermis. Jellyfish have mouths. What they do have is a mouth, tentacles, and arms around their mouth. By Andrea Thompson 01 April 2007. 4. Shares. Food that the mouth transfers into the Jellyfish’s stomach (the coelenteron) is broken down by digestive enzymes. They tend to rely on the current of the water and the wind to help them find food. A group of jellyfish are called blooms, swarms or smacks. The food is placed in the hole, which is the mouth using the tentacles. Although blue jellies have eight oral arms, other related species within this order only have three or four. Watch Corals Form a ‘Wall of Mouths’ to Catch and Eat Jellyfish. 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