Cnidarians
Examples
Aurelia aurita (bottom left), Turritopsis nutricula (bottom middle), Urticina lofotensis (bottom right)
Aurelia aurita (bottom left), Turritopsis nutricula (bottom middle), Urticina lofotensis (bottom right)
Evolutionary Milestone
Cnidarians posses three evolutionary milestones: eukaryote, tissues, and radial symmetry.
Habitat
Cnidarians live in wet environments.
Anatomical/ Structural Features
Cnidarians posses three evolutionary milestones: eukaryote, tissues, and radial symmetry.
Habitat
Cnidarians live in wet environments.
Anatomical/ Structural Features
How do they acquire nutrients
heterotrophic and herbivore
What do they eat
fish, algae, plankton
What eats them
spadefish, sunfish, and loggerhead turtles
Symmetry
Cnidarians have radial symmetry.
Mobility
Cnidarians have two stages: polyp and medusa. In the polyp stage they are sessile, but in the medusa stage they move by using tentacles.
Reproduction
Cnidarians reproduce sexually and asexually. Sexual reproduction occurs in the medusa stage. The male releases sperm and the female releases an egg into the water. The zygote comes a larvae and grows into a polyp.
Development
heterotrophic and herbivore
What do they eat
fish, algae, plankton
What eats them
spadefish, sunfish, and loggerhead turtles
Symmetry
Cnidarians have radial symmetry.
Mobility
Cnidarians have two stages: polyp and medusa. In the polyp stage they are sessile, but in the medusa stage they move by using tentacles.
Reproduction
Cnidarians reproduce sexually and asexually. Sexual reproduction occurs in the medusa stage. The male releases sperm and the female releases an egg into the water. The zygote comes a larvae and grows into a polyp.
Development