Navigator
Other: Glossary
- 10 Animals With Evolutionary Traits Plucked Straight Out of a Nightmare
- 10 Reasons to Love Slugs
- 6 Reasons to Love Cephalopods
- 9 of the World’s Deadliest Spiders
- abalone
- acarid
- acorn worm
- Agnostus
- Ameura
- ammonoid
- amphipod
- Anchura
- annelid
- arachnid
- archaeocyathid
- Are Sand Dollars Alive?
- Are Sponges Considered Animals?
- ark shell
- arrowworm
- Arthropleura
- arthropod
- Ascaris
- aschelminth
- Atrypa
- Aucella
- Australian funnel-web spider
- Bactrites
- Baculites
- Bagheera kiplingi
- baler
- barnacle
- Bathyuriscus
- beard worm
- belemnoid
- Bellerophon
- Big Bugs and Colossal Crabs: 7 Invertebrates of Unusual Size
- bivalve
- black widow
- blastoid
- blood fluke
- bloodworm
- blue crab
- blue-ringed octopus
- bolas spider
- bonnet shell
- book lung
- box jellyfish
- branchiopod
- bread crumb sponge
- brine shrimp
- brittle star
- brown recluse
- Bumastus
- cake urchin
- calcareous sponge
- California trapdoor spider
- Calymene
- Cardioceras
- carpoid
- Cassiopea
- Cedaria
- centipede
- cephalochordate
- cephalopod
- Ceratites
- Ceraurus
- Cheilostomata
- chigger
- chiton
- Chonetes
- Chrysaora
- cirripede
- clam
- clam shrimp
- Climacograptus
- clionid
- Clonograptus
- cnidarian
- cockle
- coconut crab
- colossal squid
- comb-footed spider
- Composita
- conch
- Conchidium
- cone shell
- Constellaria
- copepod
- coquina clam
- coral
- cowrie
- crab
- crab spider
- crayfish
- Crepicephalus
- crinoid
- crown-of-thorns starfish
- crustacean
- crustacean louse
- Cryptoblastus
- Cryptolithus
- Cryptostomata
- ctenophore
- curtain-web spider
- cuttlefish
- Cyathocrinites
- Cystiphyllum
- cystoid
- daddy longlegs
- Daonella
- Daphnia
- decapod
- Deiphon
- desert tarantula
- Dictyoclostus
- dicyemid
- Didymograptus
- Dielasma
- Dikelocephalus
- Diplograptus
- Do Jellyfish Have Brains?
- Do Lobsters Mate for Life?
- Do Octopuses Have Ink?
- Do We Really Swallow Spiders in Our Sleep?
- Dungeness crab
- ear shell
- earthworm
- echinoderm
- Echinosphaerites
- eelworm
- Elysia chlorotica
- entoproct
- Eospirifer
- Euphemites
- Exogyra
- eye worm
- fairy shrimp
- false scorpion
- Favosites
- feather star
- feather-duster worm
- Fenestella
- fiddler crab
- filarial worm
- fireworm
- fish louse
- flatworm
- fluke
- folding-door spider
- freshwater jellyfish
- freshwater snail
- freshwater sponge
- funnel weaver
- gammarid
- gaper clam
- garden spider
- Gastrioceras
- gastropod
- gastrotrich
- geoduck
- ghost crab
- giant crab
- giant huntsman spider
- giant squid
- giant water scorpion
- Glans
- glass sponge
- goliath birdeater
- Gonionemus
- Goniophora
- graptolite
- Greenops
- gribble
- Gryphaea
- guinea worm
- Hallopora
- Halysites
- heart urchin
- Heliophyllum
- helmet shell
- hemichordate
- hermit crab
- Hesperorthis
- Holectypus
- hooded shrimp
- horseshoe crab
- horseshoe shrimp
- How Do Spiders Make Circular Webs?
- How Long Can Ticks Live Without Food?
- How Many Eyes Does a Spider Have?
- How One Shrimp Used Its Survival Skills to Become Both Best-Selling Pet and Astronaut
- isopod
- Isotelus
- Jonah crab
- joro spider
- jumping ant spider
- jumping spider
- kelp crab
- king crab
- krill
- land crab
- list of spiders
- lobster
- lone star tick
- lynx spider
- malacostracan
- mantis shrimp
- medusa
- millipede
- mite
- mole crab
- mussel shrimp
- mustache shrimp
- myriapod
- nautilus
- nematocyst
- nematode
- Neospirifer
- nephridium
- Nine Incredible Jumping Spiders
- Nuculana
- Nuculopsis
- nudibranch
- nursery-web spider
- Obelia
- Obolus
- octopus
- ogre-faced spider
- Olenellus
- oligochaete
- olive shell
- opisthobranch
- opossum shrimp
- orb weaver
- organ-pipe coral
- orthonectid
- oyster
- palolo worm
- Paradoxides
- parchment worm
- pauropod
- pea crab
- peacock spider
- peacock worm
- peanut worm
- pelican spider
- pentastomid
- Pentremites
- periwinkle
- Phacops
- Phillipsia
- Phyllograptus
- piddock
- pill bug
- pinworm
- pirate spider
- planarian
- planula
- Platyceras
- Platycrinites
- Platystrophia
- Plectoceras
- polychaete
- polyp
- Portuguese man-of-war
- Prasopora
- prawn
- priapulid
- prosobranch
- protochordate
- Protostomia
- pterobranch
- pteropod
- pulmonate
- purple sail
- purseweb spider
- quahog
- radula
- rag worm
- ravine trapdoor spider
- ray spider
- red crab
- red spider
- redback
- Rhynchotrema
- Rhynchotreta
- ribbon worm
- rotifer
- sac spider
- sand dollar
- sand flea
- scale worm
- scallop
- scampi
- Scaphites
- Schistosoma
- schizocoelomate
- Schizodus
- scorpion
- Scypha
- sea anemone
- sea cucumber
- sea fan
- sea gooseberry
- sea hare
- sea lily
- sea mouse
- sea pansy
- sea pen
- sea spider
- sea star
- sea urchin
- sea walnut
- sea whip
- segmented spider
- sheet-web weaver
- shellfish
- shipworm
- shrimp
- siliceous sponge
- silk spider
- skeleton shrimp
- slipper shell
- slug
- snail
- solenogaster
- sow bug
- spider
- spider crab
- spiny-headed worm
- spitting spider
- sponge
- spoonworm
- squid
- stenolaemate
- Streptelasma
- Stringocephalus
- Stromatoporida
- Stropheodonta
- Strophomena
- sunspider
- swimming crab
- Tabulata
- tadpole shrimp
- Taenia
- tailless whip scorpion
- tanaid
- tapeworm
- tarantula
- tardigrade
- tentacle worm
- Tetractinella
- Tetragraptus
- Theodossia
- threadworm
- tick
- Today in History—March 9: The First Footage of a Colossal Squid at Home
- top shell
- Tornoceras
- trapdoor spider
- Trepostomata
- Trichinella spiralis
- Trigonia
- trilobite
- triton shell
- Trochonema
- trochophore
- Tropidoleptus
- Tropites
- trumpet
- tube anemone
- tube worm
- tunicate
- turban shell
- turret spider
- turritellid
- tusk shell
- Types of Spiderwebs
- Uninvited Guests: The 7 Worst Parasitic Worms
- urchin
- varroa mite
- velvet crab
- velvet worm
- Venericardia
- Venus comb
- Venus’s flower basket
- Venus’s girdle
- vinegarroon
- volute
- wandering spider
- water flea
- water spider
- wentletrap
- whale louse
- What Is the Most Venomous Jellyfish?
- whelk
- Which Is Bigger: Sperm Whale or Colossal Squid?
- whip scorpion
- whipworm
- Why Are People Afraid of Spiders?
- Why Do Crabs Walk Sideways?
- wireworm
- wolf spider
- wood louse
- worm
- worm shell
- Worthenia
- zebra mussel
- zoanthid
Navigator
Other: Glossary
- razor clam
- Rensselaeria
- Resserella
- bubble shell
- Byssonychia
- hookworm
- horn coral
- horny sponge
- horsehair worm
- Horseshoe Crab: A Key Player in Ecology, Medicine, and More
- horseshoe worm
- How Big Is the Giant Squid?
- How Do Oysters Make Pearls?
- How Fast Are Snails?
- How Many Hearts Does an Octopus Have?
- How Many Tentacles Does a Jellyfish Have?
- Hydra
- Hydractinia
- hydroid
- immortal jellyfish
- Inoceramus
- invertebrate
- Irukandji jellyfish
- jellyfish
- jingle shell
- kinorhynch
- lamp shells
- land snail
- leech
- Leptaena
- Leptodesma
- Leptodus
- Leucosolenia
- limpet
- lingulid
- Linoproductus
- lion’s mane jellyfish
- Liriope
- Lituites
- liver fluke
- lobed comb jelly
- lobopod
- lophophorate
- Lophophyllum
- Lophospira
- Loxonema
- lugworm
- lungworm
- lynnhaven
- Maclurites
- macroinvertebrate
- marennes
- medicinal leech
- mesozoan
- Mexican jumping bean
- millepore
- mitre shell
- Modiolopsis
- mollusk
- Monograptus
- monoplacophoran
- Monopleura
- moon jelly
- moss animal
- Mucrospirifer
- murex
- mussel
- Myalina
- Myophoria
