How many are major phyla?
There are over 20 phyla recognized by taxonomists, but the major
ones are
Porifera - sponges
Cnidaria - jellyfish, sea anemones, coral
Ctenophora - comb jellies
Patyhelminthes - flatworms
Nematoda - roundworms
Annelida - segmented worms
Mollusca - clams, snails, squid, slugs
Arthropoda - crabs, lobsters, spiders, insects
Nemertea - ribbon worms
Vertebrata - fish, amphibians, reptiles, birds, and mammals