Answer. Sea animals are very intelligent as they start eating the bizarre meal from its head first followed by the delicate tentacles. Box jellyfish is a specie of Jellyfish that is well known for being one of the most poisonous marine animal on Earth. It even preys on other jellyfish, not of its own species. Not only do box jellyfish give off hazardous venom, they're also extremely rapid swimmers, adding to their overall intimidating reputation. They can reach sizes of 10 inches in diameter with tentacles 10 feet long. Some species of jellyfish are suitable for human consumption and are used as a source of food and as an ingredient in various dishes. Jellyfish eat almost anything. Do box jellyfish eat zooplankton? What Do Jellyfish Eat via: pinterest.com. The … They would also eat the larvae of other species of jellyfish. Edible jellyfish is a seafood that is harvested and consumed in several Asian and Southeast Asian countries, and in some Asian countries it is considered to be a delicacy.Edible jellyfish is often processed into a dried product. It has a cube like structure (medusae) due to which it is called box jellyfish. Box jellyfish (class Cubozoa) are cnidarian invertebrates distinguished by their cube-shaped medusae.Some species of box jellyfish produce extremely potent venom: Chironex fleckeri, Carukia barnesi and Malo kingi.Stings from these and a few other species in the class are extremely painful and can be fatal to humans. Box jellyfish are poisonous, but not dangerous, to consume–at least for some marine predators. Do box jellyfish eat krill? What Do Jellyfish Eat via: pinterest.com. If you know the answer to this question, please register to join our limited beta program and start the conversation right now! WHAT do Jellyfish Eat? Wiki User March 03, 2015 4:28AM. They are also known to eat fish eggs whenever it finds them. Jellyfish eat many different types of things, such as small plants (phytoplankton), copepods (crustacean zooplankton), fish eggs and other small fish called larvae; they also eat the planktonic eggs and young stages (also called larvae) of many different kinds of marine animals. We have gathered information about the size of box jellyfish and some pictures so that you can have a clear idea about how big do box jellyfish get. Wiki User February 12, 2009 3:02PM. This depends on the size of jellyfish. Unlike true jellyfish, box jellyfish actively hunt for food. Asked in Jellyfish What is the prey of the Australian box jellyfish? Box Jellyfish are classified as carnivores (meat eaters) i.e. The infamous box jellyfish developed its frighteningly powerful venom to instantly stun or kill prey, like fish and shrimp, so their struggle to escape wouldn’t damage its delicate tentacles. Still, the ocean sunfish feeds on jellyfish, and jellyfish is the main food for some species of sea turtles.