Dec 13, 2025 · 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 …

Jellyfish are found all over the world, from surface waters to the deep sea. Scyphozoans (the "true jellyfish") are exclusively marine, but some hydrozoans with a similar appearance live in fresh …

Discover facts about gelatinous jellyfish, including what they eat, how they move and the clever stinging adaptation that has helped them flourish for millions of years.

Nov 8, 2025 · Jellyfish are prehistoric marine creatures and have been known to exist in oceans for the last millions of years. Have tentacles around their mouths! View all of our Jellyfish …

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...

Dec 13, 2019 · Jellyfish lack a central nervous system, a circulatory system, and a respiratory system. Compared to vertebrate animals, they are extremely simple organisms, characterized …

Jul 3, 2025 · Discover the fascinating world of jellyfish—learn about their habitat, behavior, diet, lifecycle, adaptations, and role in ocean ecosystems.

Apr 6, 2025 · Imagine floating through the ocean without a brain, heart, or bones, yet surviving for over 650 million years! Jellyfish are some of the most fascinating creatures in our oceans, with …

Jellyfish have been around for millions of years, even before dinosaurs lived on the Earth. Pulsing along on our ocean currents, these jelly-like creatures can be found in waters both cold and …

Sep 25, 2024 · Discover the fascinating world of jellyfish—scientific classification, habitat, diet, reproduction, predators, and their impact on humans and the environment.