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| opposite to or away from the mouth. |
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| a class within the phylum Cnidaria. Unlike other cnidarians, anthozoans do not have a medusa stage in their development. Instead, they release sperm and eggs that form a planula, which attaches to some substrate on which the cnidarian grows. |
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| The expanded basal portion of the stalk of certain sessile organisms, used for attachment to the substrate. |
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| a prominence that develops into a new individual, sometimes permanently attached to the parent and sometimes becoming detached; gemma. |
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| an alternative name for the invertebrate phylum Coelenterata, giving emphasis to the stinging structures as characteristic of the phylum |
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| a hairlike sensory process projecting from the surface of a cnidoblast, believed to trigger the discharge of the nematocyst. |
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| the explosive cell containing one giant secretory organelle or cnidae that define the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.). |
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| a gelatinous layer of cells in the body wall of some coelenterates and ctenophores |
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| a locomotor organ consisting of a row of strong cilia whose bases are fused |
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| commonly known as comb jellies) are a phylum of animals that live in marine waters worldwide. |
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| the phylum comprising the comb jellies. |
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| Box jellyfish (class Cubozoa) are cnidarian invertebrates distinguished by their cube-shaped medusae. |
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| of or pertaining to an epithelial cell of a coelenterate that contains contractile fibrils and acts as a muscle. |
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| functions in both digestion and the distribution of nutrients and particles to all parts of the body. Organisms belonging to two major phyla, the Coelenterata and the Platyhelminthes, possess gastrovascular cavities. |
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| an opening through which eggs or sperm are released, especially in invertebrates. |
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| a structure found in many cold-blooded organisms and soft-bodied animals consisting of a fluid-filled cavity, the coelom, surrounded by muscles. |
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| coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes |
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| any of several parts or organs of the mouth, as the labrum of a crustacean. |
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| a segment, bone, cell, etc., resembling a handle. |
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| a saucer-shaped or dome-shaped, free-swimming jellyfish or hydra. |
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| an organ in coelenterates consisting of a minute capsule containing an ejectable thread that causes a sting. |
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| pertaining to or affecting both nerves and muscles. |
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| of, pertaining to, or involving the mouth |
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| located around the mouth and hold the stinging cells, or cnidocysts, which are used to inject potential prey (or potential predators) with venom. |
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| a sedentary type of animal form characterized by a more or less fixed base, columnar body, and free end with mouth and tentacles, especially as applied to coelenterates. |
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| coelenterates in which the polyp stage is absent or at least inconspicuous: jellyfishes |
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| asexual reproduction by division into segments, as in tapeworms and jellyfishes |
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| any of various slender, flexible processes or appendages in animals, especially invertebrates, that serve as organs of touch, prehension, etc.; feeler. |
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| Most reef-building corals contain photosynthetic algae, called zooxanthellae, that live in their tissues. |
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