Cnidaria - Wikipedia
Cnidarians are classified into four main groups: the almost wholly sessile Anthozoa (sea anemones, corals, sea pens); swimming Scyphozoa (jellyfish); Cubozoa (box jellies); and Hydrozoa (a diverse group that includes all the freshwater cnidarians as well as many marine forms, and which has both sessile members, such as Hydra, and colonial swimme...
Cnidarian | Definition, Life Cycle, Classes, & Facts | Britannica
2024年10月18日 · The phylum Cnidaria is made up of four classes: Hydrozoa (hydrozoans); Scyphozoa (scyphozoans); Anthozoa (anthozoans); and Cubozoa (cubozoans). All cnidarians share several attributes, supporting the theory that they had a single origin.
What Are Cnidarians? - Types and Characteristics - AnimalWised
2023年10月4日 · Cnidarians are a diverse group of aquatic animals that includes jellyfish, corals, sea anemones, and hydras. Learn about the different types of cnidarians, their characteristics, and reproduction.
Cnidaria - Meaning, Examples, Characteristics, Symmetry, …
Cnidarians are radially symmetrical, soft-bodied animals found in aquatic habitats. Their common names are sea anemones, jellyfish, corals and hydras. Some other cnidarians include Portuguese men-of-war, sea fans, sea pens and sea whips.
Cnidarians - Examples, Characteristics, Reproduction, & Lifecycle
2024年8月24日 · Currently, over 11,000 species of cnidarians fall under four main classes: Anthozoa (sea anemones, corals, sea pens), Scyphozoa (jellyfish), Cubozoa (box jellies), and Hydrozoa (hydrozoans). Description. Cnidarians are diploblastic organisms, with their body cells organized in two distinct germinal layers, the ectoderm and endoderm.
Cnidarians - MarineBio Conservation Society
Cnidarians are a diverse group of animals that belong to the phylum Cnidaria. They are characterized by the presence of specialized stinging cells called cnidocytes, which are used for defense and capturing prey. Cnidarians exhibit a wide range of body forms, including polyps, medusae, and colonies.
Cnidarians Facts: Corals, Jellyfish, and Sea Anemones - ThoughtCo
2019年7月12日 · 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 and are quite diverse, but they share many similar characteristics.
28.2: Phylum Cnidaria - Biology LibreTexts
The phylum Cnidaria contains about 10,000 described species divided into four classes: Anthozoa, Scyphozoa, Cubozoa, and Hydrozoa. The anthozoans, the sea anemones and corals, are all sessile species, whereas the scyphozoans (jellyfish) and cubozoans (box jellies) are swimming forms.
Characteristics of Phylum Cnidaria | Biology for Majors II
Phylum Cnidaria includes animals that exhibit radial or biradial symmetry and are diploblastic, meaning that they develop from two embryonic layers, ectoderm and endoderm. Nearly all (about 99 percent) cnidarians are marine species.
28.2A: Phylum Cnidaria - Biology LibreTexts
2024年11月23日 · The phylum Cnidaria contains about 10,000 described species divided into four classes: Anthozoa, Scyphozoa, Cubozoa, and Hydrozoa. The anthozoans, the sea anemones and corals, are all sessile species, whereas the scyphozoans (jellyfish) and cubozoans (box jellies) are swimming forms.