Jellyfish

A:

Jellyfish are carnivores and excellent predators. They sting with tentacles to subdue small aquatic fish, and eat the eggs and invertebrates that stick to their tentacles.

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  • How do jellyfish swim?

    Q: How do jellyfish swim?

    A: Jellyfish swim by opening and closing a part of their body called the bell, which is the transparent, sack like part of their body that the tentacles hang from. The bell catches water when it opens and ejects it when it closes, propelling the jellyfish forward.
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  • What do moon jellyfish eat?

    Q: What do moon jellyfish eat?

    A: Moon jellyfish primarily eat planktonic crustaceans, but they also eat other small plankton including molluscs, fish eggs and smaller jellyfish. They catch their food with sticky mucus that lines the underside of their bells and then direct it into their four stomach pouches with their tentacles.
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  • What kinds of food do jellyfish eat?

    Q: What kinds of food do jellyfish eat?

    A: Jellyfish are opportunistic carnivores that will eat almost anything they come across. Smaller jellyfish consume plankton, larger ones eat fish eggs, crustaceans and snails, and the very largest jellyfish can catch and eat whole fish. Jellyfish can also be cannibalistic.
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  • What is a red jellyfish?

    Q: What is a red jellyfish?

    A: The red jellyfish, Tiburonia granrojo, is a large, predatory species of jellyfish living deep in the Pacific Ocean. Dark red in color, it grows to 2 to 3 feet in diameter and has a fleshy appearance.
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  • What is the jellyfish's habitat?

    Q: What is the jellyfish's habitat?

    A: Jellyfish are found in all of the Earth's oceans, including the very deep sea, as well as shallow saltwater lakes. Various jellyfish species have a wide range of living preferences, with some preferring arctic waters, and others preferring warmer tropical waters. There are animals called hydrozoans that are closely related to jellyfish and live in freshwater lakes.
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  • Can you get a pet jellyfish for kids?

    Q: Can you get a pet jellyfish for kids?

    A: Non-poisonous jellyfish, such as Moon jellyfish and Blue Blubber jellyfish, are widely available and appropriate as pets for children. Pet jellyfish for kids require a special aquarium and fish-specific diets.
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  • What are jellyfish made of?

    Q: What are jellyfish made of?

    A: Jellyfish are made of 95 percent water and 5 percent solid matter. The solid matter is composed of three layers: the epidermis is the outer layer, the mesoglea or the jelly is the middle layer and the gastrodermis is the inner layer.
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  • How does a jellyfish move?

    Q: How does a jellyfish move?

    A: Jellyfish move by floating with the ocean's currents, jet propulsion or by using cilia. Jellyfish typically move deep in the water, though some move in shallow water. Man-o'-wars float on top of the water.
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  • Are jellyfish carnivores, herbivores or omnivores?

    Q: Are jellyfish carnivores, herbivores or omnivores?

    A: Jellyfish are carnivores and excellent predators. They sting with tentacles to subdue small aquatic fish, and eat the eggs and invertebrates that stick to their tentacles.
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  • What are some predators of the jellyfish?

    Q: What are some predators of the jellyfish?

    A: Some predators of the jellyfish include other jellyfish, sunfish, some sea turtles and humans. Occasionally birds and other fish will bite around the non-venomous inner tissue of the jellyfish, dodging the outer tentacles altogether.
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  • What are the body parts of a jellyfish?

    Q: What are the body parts of a jellyfish?

    A: A jellyfish's body is made up mainly of water, along with a jelly-like substance called mesoglea, tentacles, a mouth and a thin layer of skin. Its body is around 90 percent water and its skin is only one cell thick.
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  • How are jellyfish scientifically classified?

    Q: How are jellyfish scientifically classified?

    A: Jellyfish are animals of the phylum Cnidaria, class Scyphozoa, order Semaeostomeae and family Cyaneidae. The phylum Cnidaria is an incredibly ancient group of invertebrate animals, stretching back hundreds of millions of years. Jellyfish are among the oldest types of multicellular animals. True jellyfish have a number of distinguishing characteristics by which they are classified.
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  • Q: How do jellyfish eat?

    A: Jellyfish eat their prey by first paralyzing them by stinging them, and then drawing the prey in through the mouth, which is a hole in the middle of the jellyfish's body, reports National Geographic. When the jellyfish has eaten and digested the prey, the waste is released through this same hole, or "mouth."
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  • How do you make a jellyfish tank?

    Q: How do you make a jellyfish tank?

    A: Although there are several approaches to making a jellyfish tank, the most straightforward method involves modifying the filtration system of an existing home aquarium. The required supplies are a 5-gallon aquarium with lid light, an under-gravel filter plate with modular air tube, rigid filter tubing, 7 pounds of glass aquarium substrate beads, a small air pump, distilled water and a bag of seawater aquarium salt mix.
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  • What are some facts about the box jellyfish?

    Q: What are some facts about the box jellyfish?

    A: Box jellyfish live by the coasts of Australia and in the Indo-Pacific Ocean. They have up to 15 tentacles, which can reach 10 feet in length. Although they do not have a central nervous system, box jellyfish have advanced vision.
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  • Q: What are some jellyfish physical characteristics?

    A: All jellyfish are invertebrates, which means that they lack backbones. The rest of their anatomy is quite simple, including a primitive nervous system that is capable of detecting heat, light, food and vibrations. Since jellyfish lack eyes and ears, these nerves are their primary method of navigating the ocean.
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  • Q: What are infant jellyfish called?

    A: Infant jellyfish are called ephyrae. Jellyfish begin their life cycle as larvae. The larvae float in the currents until they attach to a rock. Once they attach to the rock, they are known as polyps. Polyps eventually bud into ephyrae.
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  • Q: Why do jellyfish glow?

    A: Jellyfish that glow do so in order to attract prey and as a form of defense against predators. Jellyfish are able to do so due to phosphorescence, luminescence or bioluminescence.
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  • Q: Where do sea anemones live?

    A: Sea anemones are found clinging to sea ice at the poles, adorning coral reefs in the tropics and throughout the world's oceans. The vast majority of sea anemones are found in shallow waters, though scientists have identified species that live at depths of approximately 33,000 feet.
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  • Q: Where do jellyfish live?

    A: There are many different species of jellyfish and most of these, including the moon jellyfish, live in the world's oceans. Jellyfish species were not originally found all over the world's oceans, but they were moved around by accident over many years by ships.
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  • Q: What are characteristics of jellyfish?

    A: Jellyfish are free-swimming marine animals composed of more than 95 percent water, with bodies consisting of an umbrella-shaped bell and trailing tentacles. Jellyfish are radially symmetrical with a central axis through the length of their bodies. As a result, they have a top and bottom, but no left or right sides, as do most animals whose bodies are bilaterally symmetrical.
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