JELLYFISH

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JELLYFISH

• No bones. No brains. But what a sting!
  

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FACTS ON JELLYFISH

• Belong to the Phylum Cnidaria
• Radial Symmetry
• Medusa shape
• Fertilize externally
• -sperm egg released in water

• 2 Layers
• -epidermis -outer
• - gastrodermis -inner
• mesoglea -jelly between the layers
• Stinging cells called
• cnidocytes.

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Habitat

• Jellyfish are found in every ocean. They live in
  both deep and shallow coastal waters.

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Feeding

• Jellyfish eat tiny plankton, invertebrates,
  larvae, and small fish. Jellyfish have sensors in
  their tentacles that can detect movement around
  them. When movement is detected, stingers shoot
  out and paralyze the prey. The jellyfish then
  uses its tentacles to bring the prey to its mouth
  and ingest it.

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Movement

• Jellyfish usually drift or move gracefully
  through the ocean, occasionally you will see them
  swimming. Jellyfish swim by pulsations of their
  umbrella or bell shape. It is coordinated by a
  very simple nervous system.

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Appearance

• Jellyfish often appear clear or pale blue color.
  But they can also be yellow, deep blue, bright
  purple, pale lilac, bright orange, deep red.
• When they are disturbed at night, they give off a
  cold bright light called luminescence.

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More Facts

• Made up of 95 water
• more than 200 species of jellyfish
• Jellyfish have a short lifespan, the longest
  surviving species living only two to six months
• ocean sunfish and leatherback turtles are two of
  the jellyfish predators

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LIFE CYCLE