Science Quiz / Name that Cnidaria

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Can you name the Cnidaria ?

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CharacteristicClass
sea anemones and corals
reproduces via a sexually dispersive medusa, solitary or colonial asexual polyp
contains stony, octocorals, and soft... stony secrete a cup of calcium carbonate
square shaped body
contains one species 'tailor-made' to attack and kill vertebrates
hydroids
swim by rhythmical contractions of the bell; pulsations controlled by marginal bodies that have 'pacemaker' cells
more sophisticated than most jellyfish species- swim better and 8 of 24 eyes function extremely well (have lense and retina)
Portuguese-man-of-war
CharacteristicClass
medusa-produces sperm or eggs; fertilised eggs produce planula larvae which form polyps; polyps asexually produce medusa which then detach
changes in direction are controlled by CaCo3 granules in the rhopalium
box jellyfish
jellyfish (general, other than box)
polyp only; no medusae
feed by swimming to the surface and drifting down, trapping prey with nematocysts
continous gastrovascular cavity among members of the colony
colonies form by budding rather than by detaching

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