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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  • 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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  • 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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  • 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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  • Where do box jellyfish live?

    Q: Where do box jellyfish live?

    A: According to National Geographic, box jellyfish, also called sea wasps, live off the coastal waters of Northern Australia and throughout the Indo-Pacific. Box jellyfish also are frequently found off the coasts of Vietnam, Hawaii and the Philippines.
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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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  • 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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  • 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 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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  • 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 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 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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  • Q: What is the economic importance of Cnidarians?

    A: Although they may not look like it, many animals belonging to the phylum Cnidaria actually have a quite significant economic importance for humans, especially those belonging to the Anthozoa class. For instance, scientists have discovered many chemical compounds in Cnidarians that can be used to treat cancer and other illnesses.
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  • Q: Do jellyfish have brains?

    A: Jellyfish do not have brains, and most barely have nervous systems. They have primitive nerve cells that help them orient themselves in the water and sense light and touch. Jellyfish can be tiny or grow to several feet in diameter.
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  • Q: What types of jellyfish are in Florida?

    A: Types of jellyfish in Florida include the moon jellyfish, the cannonball jellyfish, the sea nettle and the box jellyfish. Other jellyfish include the mushroom jelly. The Portuguese man-of-war isn't really a jellyfish, but looks and stings like one.
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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: Is there an immortal jellyfish?

    A: There is a species of jellyfish that theoretically live forever; it is called the Turritopsis dohrnii. It lives in the Mediterranean Sea and around the waters of Japan.
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  • Q: Does a jellyfish have eyes?

    A: A jellyfish has no eyes, ears, nose, brain or heart. In fact, a jellyfish has no head or bones of any kind and is made almost entirely of water.
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  • Q: What eats jellyfish?

    A: Creatures that eat jellyfish include tuna, sharks and sea turtles such as the leatherback and the hawksbill. These animals eat jellyfish despite their prey's stinging tentacles. Jellyfish also eat each other.
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  • Q: Is there a clear jellyfish species?

    A: Many species of jellyfish are transparent or partially transparent. The bell-shaped body of the jellyfish is filled with a gelatinous substance that is mostly water. With no skeleton and few specialized internal organs, there is very little to prevent light from passing through a jellyfish's body.
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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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