• The Crayfish' by T. H. Huxley, 1879 or here
• Biospeleology - The Biology of Caves, Karst, and Groundwater. 

FRESHWATER CRAYFISH FORUM. Launched in late 2004 as a way for crayfish enthusiasts to interact.

CRAYFISH-L - A discussion list-server about crayfishes.

• World Lists of the Isopoda
• Isopods - Virginia Institute of Marine Science

• The Amphipod Home Page
• Amphipods of Antarctica
• The Wim VADER site, Tromsø Museum, Norway
• Links to Web Sites dedicated to AMPHIPODS
• The pictures of ALEXANDER et al.- Canadian Museum of Nature
• The Gertraud KRAPP-SCHICKEL site, University of Bonn, Germany
• The Oliver COLEMAN site, Berlin Museum, Germany
• The Subterranean Amphipod Database, Old Dominion University
• The Uwe KILS site, Rudgers New Jersey University, USA

• Texas Natural History Collection-Texas Memorial Museum
• UC-Berkeley Museum
• United States National Museum, Department of Invertebrates
• Lobster Direct
• The Redclaw Guy
• Crustacean Neuroscience