Jellyfish are mainly free-swimming marine animals, although a few are anchored to the seabed by stalks rather than being motile. They are made of an umbrella-shaped main body made of …

5 days ago · Jellyfish, any planktonic marine member of the class Scyphozoa (phylum Cnidaria), a group of invertebrate animals composed of about 200 described species, or of the class …

Jellyfish are invertebrates – animals that don’t have a backbone – and belong to a group called Cnidaria. Some of their closest relatives include colourful corals and anemones.

May 26, 2025 · Jellyfish are some of the most fascinating creatures in our oceans, with their translucent bodies and graceful movements. These ancient animals have adapted to nearly …

But despite their name, jellyfish aren't actually fish—they're invertebrates, or animals with no backbones. Jellyfish have tiny stinging cells in their tentacles to stun or paralyze their prey...

Nov 8, 2025 · Jellyfish, ocean drifters without brains or bones, have lived for millions of years. Find out how they sting, feed, and glow underwater.

Jul 3, 2025 · What sets jellyfish apart is that their bodies are made up of about 95% water, giving them that gelatinous appearance. They lack bones, hearts, lungs, and even brains, yet they …

Jellyfish are marine invertebrates belonging to the Scyphozoan class of the Cnidaria phylum. The body of an adult jellyfish is composed of a bell-shaped, jellylike substance enclosing its …

Aug 30, 2024 · Jellyfish are some of the Earth's most ancient extant animals. They're also immensely diverse—most organisms that are called jellyfish are part of the phylum Cnidaria, …

Nov 1, 2018 · Jellyfish are an animal in the Phylum Cnidaria and the Subphylum Medusozoa. While they are popularly called “jellyfish,” many marine biologists prefer the terms “jelly” or …