CNIDARIA

Cnidaria

• The word Cnidaria comes from the Greek word Cnidos.
• This means stinging nettle.
• Cniadria are most well known for their poisonous stingers. 
• These are called nematocysts.

Cnidaria

• Cniadaria is found underwater.
• There are thousands of species living in the oceans.
• Some are even found in freshwater lakes.

Cnidaria-classes

• Anthozoa
• Cubozoa
• Hydrozoa
• Scyphozoa

Anthozoa

• includes coral, anemones, sea fans, and sea pens
• many animals that have polyps that look like flowers
• large, carnivorous polyps  
• feed on fish
• fossil record that dates back 550 million years

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Cubozoa

• Box jellyfish
• square shaped top
• 4 evenly spaced tentacles
• deadly
• 20 known species

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hydrozoa

• can't survive outside of the colony
• about 3700 species
• small predatory animals

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Scyphozoa

• typical jellyfish you see at the beach
• no head, skeleton, or special organs
• stings may cause rash, muscle cramps, or even death

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