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Cnidaria Vocabulary

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