1.
Members of the phylum Cnidaria, including jellyfish, corals, and sea anemones.
2.
Symmetry around a central point, a characteristic feature of cnidarians.
3.
The tubular, sessile body form of cnidarians, often found attached to substrates.
4.
The bell-shaped, free-swimming body form of cnidarians, typically seen in jellyfish.
5.
A class of cnidarians exhibiting both polyp and medusa forms, examples include the portuguese Man o' War.
6.
A class of cnidarians predominantly in the medusa form, including true jellyfish.
7.
A class of cnidarians primarily existing as polyps, including corals and sea anemones.
8.
Specialized cells in cnidarians containing nematocysts for prey capture and defense.
9.
Stinging organelles within cnidocytes, injecting toxins into prey.
10.
A central cavity in cnidarians where digestion occurs and also functions in circulation.
11.
A form of asexual reproduction in which a new individual grows as an outgrowth from the parent.
12.
The ability of cnidarians to regrow lost body parts.
13.
Photosynthetic algae that form symbiotic relationships with some cnidarians, especially corals.
14.
Having a diet consisting of other animals.
15.
The inner layer of cells lining the gastrovascular cavity in cnidarians.
16.
Stress-induced expulsion of symbiotic algae from coral tissues, leading to a loss of color and vitality.
17.
The union of egg and sperm outside the body, common in many cnidarians.
18.
Close and often mutually beneficial associations between different species.
19.
Complex ecosystems formed by the accumulation of calcium carbonate exoskeletons secreted by coral polyps.
20.
The wide range of forms and adaptations seen in the diverse group of animals within the phylum Cnidaria.
