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Cnidaria Vocabulary

Name: ___________________
Date: ____________________
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Across
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All species of cnidarians are ________.
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Two germ layers during embryonic development
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outer layer formed from the ectoderm
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Most common reef which projects seaward directly from the shore
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Nematocyst sensor
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one organism can produce male and female gametes
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Type of cells that can contract, extend, bend, and pulse the body or tentacles of the organism
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Class considered the true jellyfish
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Most cnidarians are ________ - feed on small to medium sized fish
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When polyps expel their algal cells and the colony takes on a stark white appearance
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Type of budding in which polyps make other polyps that will eventually produce a medusa
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Symmetry of cnidarians where there is a central axis
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Permanently attached, not free to move about
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Simplest form of a nervous system adapted for radial symmetry. No brain
Down
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photosynthetic unicellular algae that live within the corals tissues
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Type of reef separated from their adjacent land mass by a lagoon
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Form when coral larvae attach to submerged rocks or other hard surfaces
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tissue that functions as a hydrostatic skeleton
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one organism is either male or female but not both
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Vase-shaped hydroid body form adapted to a sessile life.
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box jellies with complex eyes & potent toxins
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inner layer formed from the endoderm
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Long, coiled thread of material in a cnidocyte that contains a poison-filled barb
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_________ cavity that serves as mouth and anus and has a single exterior opening
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Cells in the tentacles that are used for self defense or to capture prey
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Umbrella or bell-shaped form adapted for free-floating or swimming
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largest class which includes true corals and sea anemones
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Knobs of tissue form on the side of the polyp, which develops a functional mouth and tentacles
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individual divides in half as one side of the polyp pulls away from the other side.