| Asterias_rubens__The_Common_Starfish Research project by Michael Richardson on this species, including its classification, habitat, adaptations, nutrition, reproduction and interactions with other species. |
| Chocolate_Chip_Starfish Photographic study by Jaclin Pisano of Protoreaster nodosus with some fine images. |
| Estarias_forbesi Exercise from Invertebrate Anatomy OnLine covering the systematics, external and internal anatomy and development of this sea star. |
| Growth_of_a_Starfish Article on the development of a starfish by Jan Parmentier with many fascinating photographs. |
| Ophioderma_brevispina Exercise from Invertebrate Anatomy OnLine covering the systematics, behavior, external and internal anatomy of this brittle star. |
| Purple_Ochre_Sea_Star_(Pisaster_ochraceus) Project by Virginia Humphreys on this starfish, including its description, natural history, evolution and distribution. |
| Seastars_of_Antarctica Photographs and information from the Underwater Field Guide to Ross Island and McMurdo Sound, Antarctica. |
| Comactinia_echinoptera Exercise from Invertebrate Anatomy OnLine covering the systematics and external anatomy of this feather star. |
| Cotton-Spinner_(Holothuria_forskali) Whilst diving round the coasts of Britain, Jane Lilley observed this sea cucumber and its behavior. |
| Cucumaria_frondosa Exercise from Invertebrate Anatomy OnLine covering the systematics, external and internal anatomy of this sea cucumber. |
| Holothuria_forskali__Black_Sea_Cucumber Photographs and a description of this species. |
| Sclerodactyla_briareus Exercise from Invertebrate Anatomy OnLine covering the systematics, external and internal anatomy of this sea cucumber, with notes on Cucumaria. |
| Leiobunum Exercise from Invertebrate Anatomy OnLine covering the systematics, classification, phylogeny and external anatomy of the harvestman. |
| Opiliones__Harvestmen The characteristics of these spiders, their life cycle, feeding and habitat, with illustrations. |
| Araneae__Spiders The characteristics of these creatures, their life cycle, feeding and habitat, with illustrations. |
| Argiope_aurantia Exercise from Invertebrate Anatomy OnLine covering the systematics, external and internal anatomy, and natural history of the garden spider. |
| Behavorial_Ecology_of_Spiders Projects and publications of Dr. Jutta Schneider related to the evolution of reproductive behavior and sociality of spiders. |
| Black_Widow_Spiders_and_Other_Spiders_of_Medical_Importance Brief information on the black widow and brown recluse; links to related web sites. |
| Brisbane_Spiders Spiders in Brisbane area, Queensland, Australia. |
| Common_Missouri_Spiders Descriptions and pictures of spiders indigenous to Missouri, USA. |
| Common_Spiders_in_Japan Line drawings, photos, and notes by Mikio Sekine. Also short articles on various insects. |
| Nick\'s_Spiders Large photo gallery and notes about the spiders of Britain, Europe, and North America. |
| Online_Coelotinae Descriptions, images, publications, type depository, and keys to the species of the spider subfamily Coelotinae. |
| Poisonous_Spiders_of_South_Carolina Factsheet from Clemson University describes widow and recluse spiders, type of injury inflicted by bites, and spider control. |
| Spider_Myths_Site This site lists the common myths about spiders and debunks them; illustrated. |
| Spider_Webring Web ring for spider lovers. |
| Spiders_in_Ohio General overview, some images, and information about spider research at Ohio State University. |
| Spiders_of_Belgium Biology, ecology, life history, and images of spiders, as well as a key to Belgian spiders. In Flemish and English. |
| Spiders_of_Brisbane Photographs and notes from the Brisbane area of Queensland, Australia. |
| Spiders_of_Medical_Importance University of Nebraska Cooperative Extension in Lancaster County factsheet and audio on local spiders of medical importance (black widow, brown recluse, sac spider, parson spider). |
| Spiders_of_North_America Attempt at a list of valid names for the spiders (Araneae) that occur in North America north of Mexico. Compiled by the American Arachnological Society. |
| Spiders_of_Northwest_Europe Images and descriptions of over 220 species commonly found in northwestern Europe, especially the area between the Netherlands and the south of France. A subsection features 190 pictures of Australia |
| Spiders_of_Queensland Identification, description, habitat, and toxicity of common spiders in Queensland, Australia. Includes section on the Australian Redback Spider (Latrodectus hasseltii). |
| Spiders_of_South_India Pictures and information about common South Indian spiders. |
| Spiders_of_Turkey Includes the full checklist for Turkey, photographs, general properties of spiders, poisonous spiders, and list of spider families. |
| Spiders_of_Wisconsin List of species found in this state with estimated populations. Includes some photos. |
| Steve\'s_Aussie_Spider_Pics Photo gallery of spiders found in the Alice Springs area, Australia. |
| World_Spider_Catalog List of all families, genera, and species of spiders, with synonymy, species counts by family, and bibliography. |
| The_World_Spider_Catalog_by_Norman_I__Platnick Detailed taxonomic information about the spider families. |
| Ammotrechella_stimpsoni Exercise from Invertebrate Anatomy OnLine covering the systematics and external anatomy of this camel spider. |