Metazoa 4 Protozoa 3 Ciliophora 2 Invertebrates 2 Parazoa 2 lower metazoa 2 Acanthocephala 1 Amoeba 1 Animal Immunology, (New March 2000) 1 Animal kingdom 1 Animal parasitic nematodes 1 Annelida 1 Apicomplexa 1 Aquaculture (Animals) 1 Aquatic Biology and Ecology 1 Arthropods 1 Biology 1 Cestoda 1 Coelomata 1 Coral reef formation 1 Cryptocaryon irritans 1 Digenea 1 Dinoflagellida 1 Fishes 1 Ichthyophthirius multifiliis 1 Insects useful 1 Kinetoplastida 1 Microspora 1 Mollusca 1 Monogenea 1