The Marine Biome

1
The Marine Biome

• Echinodermata

2
Echinodermata

• Sea Stars
• Sea Urchins
• Sand Dollars
• Sea Cucumbers

3
Body Type

• Radial symmetry.
• Lack a brain and sensing organs.
• Mouth is on underside of the body.
• No real eyes, but are sensitive to light.

4
Movement

• Thousands of tiny tube feet.
• Many have suctions cups on the ends.

5
Food

• Carnivores (stars) and Omnivores (urchins).
• Mussels, clams, oysters.
• Anything slow dying fish.
• Some eat algae and sponges.
• Some rays, sharks and other large, bony fish are
  predators.
• Urchins crabs will pick off their spines to get
  to flesh.

6
Reproduction

• External.
• Spawning.
• Release gametes to fertilize outside body
  embryos becomes zooplankton.

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Examples of Echinodermata

• Cushion Starfish

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Examples of Echinodermata

• Orange Starfish

9
Examples of Echinodermata

• Sunflower Starfish

10
Examples of Echinodermata

• Feather Starfish

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Examples of Echinodermata

• Brittle Star

12
Examples of Echinodermata

• Basket Star

13
Examples of Echinodermata

• Sea Urchin

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Echinodermata

• Location
• Sea Stars are found in all oceans.
• Sea Urchins are rarely in polar regions.
• The spines are used for protection.
• Regeneration.
• Nocturnal.