Zoology: Invertebrates
- abalone
- acorn worm
- ailanthus moth
- alderfly
- alfalfa caterpillar
- ammonite
- Annelida
- Anopheles
- ant
- aphid
- apple maggot
- apple worm
- arachnid
- argonaut
- armyworm
- arrowworm
- Arthropoda
- aschelminths
- assassin bug
- backswimmer
- bagworm
- barnacle
- bean beetle
- bean weevil
- bêche-de-mer
- bedbug
- bee
- bee fly
- bee moth
- beetle
- bivalve
- black fly
- black widow
- blister beetle
- bloodworm
- blowfly
- bluebottle fly
- boll weevil
- bollworm
- bookworm
- borer
- botfly
- Brachiopoda
- brine shrimp
- brittlestar
- brown recluse spider
- browntail moth
- Bryozoa
- bug
- bumblebee
- butterfly
- cabbage looper
- caddis fly
- cankerworm
- cantharides
- carpet beetle
- caterpillar
- centipede
- cephalopod
- cestode
- Chaetognatha
- chambered nautilus
- Chelicerata
- chigger
- chigoe
- chinch bug
- chiton
- chrysalis
- cicada
- clam
- clam shrimp
- clamworm
- click beetle
- clothes moth
- Cnidaria
- cockchafer
- cockle
- cockroach
- coconut crab
- cocoon
- codling moth
- Coelenterata
- Colorado potato beetle
- comb jelly
- conch
- copepod
- coral
- corn borer
- corn earworm
- cowrie
- crab
- crane fly
- crawfish
- crayfish
- cricket
- Crinoidea
- Croton bug
- crustacean
- Ctenophora
- curculio
- cuttlefish
- cutworm
- daddy longlegs
- damselfly
- decapod
- deerfly
- devil's coach horse
- devil's darning needle
- diving beetle
- dobsonfly
- dragonfly
- Drosophila
- dung beetle
- dust mite
- earthworm
- earwig
- Echinodermata
- Ectoprocta
- electric-light bug
- Entoprocta
- Eumetazoa
- European corn borer
- eye fly
- fairy shrimp
- feather star
- fiddler crab
- firebrat
- firefly
- flatworm
- flea
- fluke
- fly
- froghopper
- fruit fly
- gadfly
- gall fly
- gastropod
- Gastrotricha
- geoduck
- giant African land snail
- giant clam
- glowworm
- gnat
- Gnathustomulida
- graptolite
- grasshopper
- greater wax moth
- greenbottle fly
- greenfly
- grub
- Guinea worm
- gypsy moth
- hairfly
- hairworm
- harvest fly
- harvestman
- hellgrammite
- Hemichordata
- hermit crab
- Hessian fly
- honeybee
- honeycomb moth
- hornet
- horsefly
- horsehair worm
- horseshoe crab
- housefly
- hydra
- ichneumon fly
- inchworm
- insect
- invertebrate
- isopod
- Japanese beetle
- jellyfish
- jigger
- jingle shell
- June beetle
- June bug
- katydid
- king crab
- Kinorhyncha
- kissing bug
- krill
- ladybird beetle
- ladybug
- lamp shell
- larva
- leaf insect
- leafhopper
- leech
- lesser wax moth
- lice
- lightning bug
- limpet
- liver fluke
- lobster
- locust
- looper
- Loricifera
- louse
- lugworm
- maggot
- mantid
- mantis
- mantis shrimp
- May beetle
- mayfly
- mealybug
- measuring worm
- Mediterranean fruit fly
- medusa
- Mezozoa
- midge
- millipede
- mite
- Mollusca
- mollusk
- mosquito
- moss animal
- moth
- mule killer
- mussel
- mysid shrimp
- naiad
- nautilus
- Nematoda
- nematode
- Nematomorpha
- Nemertinea
- night crawler
- no-see-um
- nudibranch
- nymph
- octopus
- oil beetle
- Onychophora
- oyster
- paper nautilus
- Parazoa
- pecten
- Pelecypoda
- Pentastomida
- periwinkle
- Phoronida
- phylloxera
- pink bollworm
- pinworm
- planarian
- plant louse
- Platyhelminthes
- polyp and medusa
- Porifera
- Portuguese man-of-war
- potato beetle
- prawn
- praying mantis
- Priapulida
- pseudocoelomate
- punkie
- pupa
- purple sail
- quahog
- red bug
- red spider
- ribbon worm
- roach
- rock crawler
- Rotifera
- roundworm
- salmon fly
- San Jose scale
- sand dollar
- sand fly
- sand worm
- sawfly
- scale insect
- scallop
- scaphopod
- scarab beetle
- scorpion
- screwworm
- sea anemone
- sea cucumber
- sea fan
- sea gooseberry
- sea lily
- sea mouse
- sea nettle
- sea pansy
- sea pen
- sea slug
- sea spider
- sea star
- sea urchin
- sea walnut
- sea whip
- serpent star
- seventeen-year locust
- shad fly
- shellfish
- shipworm
- shrimp
- silkworm
- silverfish
- skipper
- slug
- snail
- snout beetle
- Spanish fly
- spanworm
- spider
- spittlebug
- sponge
- spotted lanternfly
- springtail
- squash bug
- squid
- starfish
- stick insect
- stink bug
- stonefly
- tachinid fly
- tadpole shrimp
- tarantula
- tent caterpillar
- teredo
- termite
- thrips
- tick
- tooth shell
- trapdoor spider
- treehopper
- trematode
- trepang
- trichina
- trilobite
- tsetse fly
- tumblebug
- turbellarian
- univalve
- Venus's flower-basket
- Venus's girdle
- violin spider
- walking stick
- warble fly
- wasp
- water beetle
- water boatman
- water bug
- water flea
- water scavenger
- water skater
- water strider
- wax moth, greater
- weevil
- wheat fly
- wheel bug
- whelk
- whirligig beetle
- white ant
- wireworm
- wood louse
- worm
- yellow jacket
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