Cnidarian | Definition, Life Cycle, Classes, & Facts | Britannica
2024年10月18日 · 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 anemones, sea pens, sea whips, and sea fans.
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...
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.
Types of Cnidarians - What They Are, Examples, Characteristics …
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.
Phylum Coelenterata (Cnidaria)- Characteristics, classification, examples
2023年8月3日 · Phylum Coelenterata (Cnidaria) is a diploblastic metazoa with tissue grade of construction having nematocyst and a single gastrovascular cavity.
Cnidarians - Examples, Characteristics, Reproduction, & Lifecycle
2024年8月24日 · What are cnidarians with types, examples, & habitat. How do they eat, move, and reproduce. Also, know their body symmetry, lifecycle, and organ system with pictures.
Phylum Cnidaria – General characteristics and classification
2024年10月1日 · Phylum Cnidaria consists of jellyfish, corals, sea anemones, and hydroids. They are distinguished by their stinging cells, known as cnidocytes, which they employ for defence and prey capture. The central body cavity of cnidarians functions as …
11.5: Cnidarians - Biology LibreTexts
Cnidarians have a simple nervous system consisting of a nerve net that can detect touch. They may also have other sensory structures. For example, jellyfish have light-sensing structures and gravity-sensing structures. These senses give them a …
Phylum Cnidaria ** Examples and Characteristics
Formerly known as Coelenterata (along with sea-combs), the phylum Cnidaria consists of over 11,000 species commonly found in marine habitats. They have a simple body plan consisting of two cellular layers; the ectoderm and endoderm.
28.2: Phylum Cnidaria - Biology LibreTexts
Examples include sea anemones (Figure \(\PageIndex{4}\)), sea pens, and corals, with an estimated number of 6,100 described species. Sea anemones are usually brightly colored and can attain a size of 1.8 to 10 cm in diameter.