Science Quiz / Name that Cnidaria

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Can you name the Cnidaria ?

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

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