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Jellyfish, also known as sea jellies, are the medusa-phase of certain gelatinous members of the subphylum Medusozoa, which is a major part of the phylum Cnidaria. Jellyfish are mainly free-swimming marine animals with umbrella-shaped bells and trailing tentacles, although a
Jun 20, 2024 · 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 Cubozoa (approximately 20 species). Learn more about the characteristics and natural history of jellyfish in this article.
Jellyfish. Jellyfish have drifted along on ocean currents for millions of years, even before dinosaurs lived on the Earth. The jellylike creatures pulse along on ocean currents and are abundant...
Given their diverse evolutionary history, jellies exhibit a fantastic range of shapes, sizes, and behaviors. Learn all about these squishy, brainless, beautiful creatures. Also make sure to read...
Dec 3, 2020 · Jellyfish, also known as jellies, are fascinating animals that spend their lives floating in the oceans. Unlike their name suggest, jellyfish are not really fish as they lack a backbone. In fact, these animals are actually invertebrates and they are more closely related to corals, sea anemones, and sea whips than fish.
Oct 29, 2009 · Jellyfish are ubiquitous in the Earth’s oceans. They can thrive in warm water and cold, along coastlines or out in the deep. Their bodies are about 95 percent water. And though they have no...
Jun 16, 2024 · Lacking brains, blood, or even hearts, jellyfish are pretty simple critters. They are composed of three layers: an outer layer, called the epidermis; a middle layer made of a thick, elastic, jelly-like substance called mesoglea; and an inner layer, called the gastrodermis.
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. “Jellyfish are gelatinous and jelly-like,” explains Miranda Lowe CBE, our Principal Curator of Crustacea and Cnidaria.
Feb 27, 2024 · Jellyfish (Scyphozoa) In An Aquarium. What Are Jellyfish? Jellyfish taxonomically belong to the Cnidaria phylum, one of the earliest animal groups to diverge over 540 million years ago. Cnidarians also contain corals, sea anemones and marine hydrozoans.
Oct 19, 2023 · Jellyfish 101. How much do you really know about jellyfish? Given their diverse evolutionary history, jellies exhibit a fantastic range of shapes, sizes, and behaviors. Learn all about these squishy, brainless, beautiful creatures.
