Classification

• Classified into four main groups• Hydrozoa ( Sea anemones, corals, and jellyfish)

• Scyphozoa ( cup animals and jelly fish)

• Cubozoa (box jellyfish)

• Anthozoa (sea pens, sea fans, blue coral, and black coral sea anemones)

Body Form

• Symmetry is radial• Body forms are polyp and medusa• Skeletal system is mesoglea (endoskeleton) calcium

carbonate (exoskeleton)

•

Reproduction Methods

• Polyps (Produce by asexual budding)

• Sexual reproduction (hermaphroditic)

•

Digestive System

• Gastrovascular Cavity ( nutritive muscle)

• All carnivorous

Circulatory System

• (Heart and Blood Vessels)

Respiratory System

They do not need a respiratory system

Environment

• Lives in Aquatic environments

• Mostly Marine

Interactions

• Have stung people

• They only sting if they disturb them

• Over the past six years in Queensland only 1100 cases of jellyfish stings.

Unique Features

• The mouth is surrounded by tentacles studded with microscopic stinging capsules known as nematocysts that are the agents of offense and defense.

• Cnidarians are diploblastic -- that is, the body and tentacles consist of two cell layers

• Come in a ton of different shapes and sizes

Thank You

• Thank you for watching this power point on cnidaria

• Thank you to Mrs. Tabor the awesomest Science teacher in the world

• Go seventh period!!!!!

Internet Sites

• http://animaldiversity.ummz.umich.edu/site/accounts/information/Scyphozoa.html

• http://jellieszone.com/cubozoa.htm• http://science.jrank.org/pages/3477/Hydrozoa.html• http://tolweb.org/Anthozoa• http://www.kn.sbc.com/wired/fil/pages/listjellyfisli.html

•

http://animals.about.com/od/cnidarians/ss/cnidarians.htm•