Yeti Crab: Kiwa hirsuta
- Information and a photograph of this crustacean discovered living in hydrothermal vents deep in the Pacific Ocean in 2005.
- http://www.animals-pictures-dictionary.com/rec/468-Yeti-Crab/

The Red Mangrove-tree Crab
- Photographic study of this crustacean by Hugh Mitchell-Tapping with close-ups of various appendages and information and photographs of developing larvae.
- http://www.microscopy-uk.org.uk/mag/artmay01/hmcrab.html

The Amazing Horseshoe
- Information on these crabs, family Limulidae, their anatomy, life cycle, ecological niche, spawning and medical uses.
- http://www.horseshoecrab.org/nh/hist.html

Land Crab
- Two photographs of a crab emerging from its burrow. From Kenya Beasts.
- http://www.kenyabeasts.org.uk/crab1.htm

Land Crabs in the Bahamas.
- Rod Attrill’s article outlines the strange life of Cardisoma guanhumi, and the mosquito and fish that share its burrow.
- http://www.motygido.co.uk/bahamas_crabs.htm

Wikipedia: Decapoda
- Encyclopedia article covering the order, with details of anatomy, classification, and photos of sample species.
- http://en.wikipedia.org/wiki/Decapoda

Field Guide to Kenyan Mangroves
- An introduction to flora and fauna of mangrove habitats in Kenya, with a focus on crabs.
- http://www.madeinnys.com/mangrove/

The Lobster Institute
- A cooperative program of research and education with the lobster industry at the University of Maine. Information generated through the Institute about the American lobster (Homarus americanus) is intended to help conserve and enhance the resource, there
- http://www.lobsterinstitute.org/

Asian Shore Crab - Hemigrapus sanguineus
- Profile of this species, which is becoming established on the east coast of the US. Includes photos and maps.
- http://cars.er.usgs.gov/Nonindigenous_Species/Asian_shore_crab/asian_shore_crab.html

Red Crab - Gecarcoidea natalis
- Description, bulletins, diet, habitat, breeding, migration, and human impact on the most populous crab species on Christmas Island.
- http://www.christmas.net.au/parks/crabs/

Ray Bauer Research: Marine Biology and Shrimps
- Research projects by Bauer and students on caridean and penaeid shrimps and other decapod crustaceans, emphasizing mating systems, breeding, hermaphroditism, coloration, grooming, fouling, seagrass fauna, publications.
- http://www.ucs.louisiana.edu/~rtb6933/shrimp/

Crayfish Photo Gallery
- Images of dozens of species, mainly from the central United States.
- http://www.denison.edu/~stocker/cfgallery.html

Australian Freshwater Lobster (Astacopsis gouldi)
- A look at an unusual and little known creature.
- http://www.smithton.tco.asn.au/wildlife/lobster/lobster.html

Blue Crab Archives
- Everything you'd like to know about the Atlantic Blue Crab (Callinectes sapidus) from identification, molting, mating, catching, and cooking.
- http://www.blue-crab.org

Heartbeat of Crayfish
- Description of the mechanism of the crayfish heartbeat.
- http://www.gsu.edu/~bioasx/zindex.htm