LAB: Cnidarians Flashcards Preview

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Flashcards in LAB: Cnidarians Deck (8)
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1

Cnidarians

  • Flowers of the sea
  • Diploblastic
  • Incomplete Digestive system
  • Predators

2

Phylum Cnidaria

  • 2 Forms
    • Medusa
    • ​Polyp

3

Hydra - a solitary aquatic polyp

  • Lack medusa stage
  • only exist in polyp form

4

Obelia - a polymorphic life cycle

  • 2 types of polyps in colony
    • feeding polyp (tentacles surrounding mouth)
    • reproductive polyp ( produce tiny medusae by asexual budding)

5

Sea Anemones - ​large polyps with no medusa stage

6

Coral - Colonial polyps that secrete a calcareous cup

  • Hard and Soft corals
    • ​​Sea Fan (soft coral)
  • Corallite - ​protective calcareous cup

7

Portuguese Man-o-War - a colonial polyp

8

Jellies - free-swimming medusa stage dominates life cycle

  • Benthic (bottom-dwelling) polyp stage of the life cycle is tiny