Phylum Cnidaria Classes: 1. Coral- Anthozoa 2. Hydra- Hydrozoa

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Presentation transcript:

Phylum Cnidaria Classes: 1. Coral- Anthozoa 2. Hydra- Hydrozoa 3. Sea Jellies/ Jellyfish- Scyphozoa 4. Sea Anemones- Anthozoa subclass Hexacorallia

Body Structure A. Polymorphism = more than one body form 1. Polyp 2. Medusa

Polyp Coral polyp Tube with tentacles around the mouth Sessile “Juvenile” Form Coral polyp

Polyp (sea anemone)

Medusa Umbrella shape Tentacles around mouth Motile, Free-swimming “Adult” Form

Tentacles Discharged nematocyst Have nematocysts (stinging cells) Coiled thread discharges like a harpoon Contains neurotoxin Paralyzes prey Discharged nematocyst

Habitat A. Aquatic 1. Most Marine 2. Few fresh-water

Feeding A. Carnivores (predators) B. Process of feeding 1. Tentacles sting prey with nematocysts 2. Tentacles grab prey 3. Prey pulled into mouth Lion’s mane eats another jelly

Lion’s mane jellyfish

Ecological Role Predators and prey Neurotoxins in medical research Coral – jewelry, building, reefs (surfing!) Coral reefs - habitat for many -great biodiversity - protect coastline E. Symbiosis with other organisms

Clown fish & eggs with sea anemone

Class Anthozoa: Corals

Class: Anthozoa Subclass Hexacorallia

Class- Hydrazoa

Class Scyphozoa