Topics: fish, Ostracoderm, Conodont, Lamprey, Petromyzontiformes, Hagfish, Myxini, Lamprey, Petromyzontiformes, jawed fish, Placodermi, acanthodia, chondrichthyes

Topics: Oreochromis niloticus, Clarias gariepinus

Topics: Chordate, Vertebrate evolution, Fish, Amphibian, Reptile, Bird, Mammal

Topics: fish, Placoderm, Acanthodian, Coelacanth, chondrichthyes, holocephali, elasmobranchs, teleost

Topics: Echinoderms, Hemichordates, Chordates, Salp, Doliolum, Amphioxus, Protochordata, Hemichordata, Enteropneusta, Pterobranchia, Subphylum Urochordata, larvacea, Ascidiacea, Ciona, Thaliacea

Topics: Hemichordata, hemichordate, Urochordata, tunuicates, Enteropneusta, Pterobranchia

Topics: cellular metabolism, cell, genetic, development, taxonomy, phylogeny, unicellular eukaryotes, sponge, placozoan, cridarian, ctenophore, acoelomorpha, platyzoa, mesozoa, polyzoa, kryptrochozoa, mollusc, annelid, allied taxa, ecdysozoans, trilobites, chelicerates, myriapod, crustacean, hexapod, chaetognath, echinoderm, hemichordate, chordate, fish, tetrapod, amphibian, aminote, nonavian reptile, bird, mammal, support, protection, movement, homeostasis, digestion, nutrition, nervous coordination, nervous system, nervous coordination, sense organ, chemical coordination, immunity, animal behavior, animal distribution, animal ecology

Topics: bird