The animals without a vertebral column in their body are called Invertebrate. Unicellular organisms are also divided into this Invertebrate. They have a single cell. The invertebrates animals are classified into 9 phyla. They are listed below:
Phylum | Examples |
Porifera
|
Sponges |
Cnidarians | Jellyfish, corals, anemones, hydra |
Platyhelminthes | Flatworms, flukes, tapeworms |
Echinodermata | Sea stars, brittle stars, sea urchins, sea cucumbers |
Mollusca | Snails, clams, squids, octopi, other mollusks |
Nematoda | Ascaris, vinegar eels, hookworms, nematodes, pinworms |
Arthropoda | Crabs, scorpions, insects, spiders, millipedes, centipedes, barnacles |
Annelida | Earthworms, leeches, lugworms |
Chordata | Sea squirts, lancelets |