sea lamprey, gobies, stickleback, eels, cohos, hellbender, zebra mussel, shovelnose, sturgeons, mollusks, alewives, mosquitofish, hagfish, rainbow smelt, plesiosaurs, tunicates, jawless fish, burbot, protozoans, amphipods, mussels, killifish, crabs, murres, elvers, otters, subadult, paddlefish, snakeheads, crinoids, sculpins, platypuses, larvae, ichthyosaurs, fish, crustaceans, carp, eiders, grass carp, freshwater mussel, organisms, species, daphnia, monotremes, caecilians, phalaropes, pipefish, trematode, ruffe, brook trout, flatworms, lake trout, tadpoles, squawfish, cormorants, mammals, bivalves, threadfin, northern snakehead, damselflies, smallmouth bass, frogs, ratfish, zooplankton, isopods, crayfish, toads, chinooks, belugas, beavers, tadpole shrimp, copepods, salamanders, brown trout, toadfish, rotifers, cichlids, stoneflies, ostracods, lungfish, diamondback terrapin, steelhead, baleen whale, northern pike, saltwater, oncorhynchus, tomcod, parasites, salvinia, freshwater fish, wrigglers, grebes, woodrat, creatures, invertebrates, cyanobacteria, horseshoe crab, auks, molluscs, copperheads, carcharhinus, pteropods, lamprey, amphibians, shrews, turtles, birds, conifers, crocodiles, oysters, songbirds, weevils, bats, bears, cockroaches, dragonflies, fishes, insects, kangaroos

agnatha, cyclostomata, family petromyzontidae, genus petromyzon, hyperoartia, hyperotreta, myxiniformes, myxinoidea, myxinoidei, order cyclostomata, petromyzon, petromyzoniformes, petromyzontidae, suborder hyperoartia, suborder hyperotreta, suborder myxiniformes, suborder myxinoidei, suborder petromyzoniformes, superclass agnatha