Please---------------porifera---sponges Call-------------------cnidaria--jellyfish, hydra Paul------------------platyhelminthes, flatworms Newman------------nematoda, roundworms After------------------annelida, segmented worms Monday's-----------mollusca, snails, octopods, squid Absolutely----------arthropoda, insects, spiders, crustaceans Exciting-------------echinodermata, starfish, sea urchins Class----------------chordata, fish, amphibians, reptiles...