Cnidarians are a very ancient phylum, with fossils having been found in rocks formed about 580 million years ago during the Ediacaran period, preceding the Cambrian Explosion. Other fossils show that …

Cnidarian, any member of the phylum Cnidaria (Coelenterata), a group of more than 9,000 species of mostly marine animals. The group includes corals, hydras, jellyfish, Portuguese men-of-war, sea …

Aug 24, 2024 · Cnidarians are diploblastic organisms, with their body cells organized in two distinct germinal layers, the ectoderm and endoderm. These cells are bound by intercellular connections and …

The phylum Cnidaria (pronounced “nih DARE ee uh”) includes soft-bodied stinging animals such as corals, sea anemones, and jellyfish (Fig. 3.23 A). The phylum’s name is derived from the Greek root …

The Phylum Cnidaria includes such diverse forms as jellyfish, hydra, sea anemones, and corals. Cnidarians are radially or biradially symmetric, a general type of symmetry believed primitive for …

Cnidarians are incredibly diverse in form, as evidenced by colonial siphonophores, massive medusae and corals, feathery hydroids, and box jellies with complex eyes. Yet, these diverse animals are all …

Oct 4, 2023 · Cnidarians are a diverse group of marine animals that belong to the phylum Cnidaria. They are known for their simple body structure, which typically includes a sac-like body with a central …

Aug 29, 2023 · Cnidarians or Cnidaria are the first true metazoans (having bodies comprised of cells that are differentiated into tissues), exclusively aquatic. About 99% of Cnidarians occur in the marine …

Phylum Cnidaria includes animals that show radial or biradial symmetry and are diploblastic: they develop from two embryonic layers. Nearly all (about 99 percent) cnidarians are marine species.

Jul 12, 2019 · The Cnidaria (Cnidaria spp.) is the phylum of animals that contains corals, jellyfish (sea jellies), sea anemones, sea pens, and hydrozoans. Cnidarian species are found throughout the world …