Sheppard Software
Sheppard Software: Horseshoe Crabs
This site gives an in-depth description of a daddy long legs, including its behavior, appearance, reproduction, and classification. The site includes photos and illustrations and an interactive quiz to test your understanding.
Other
Horshoe Crabs and Human Use
A well-written review of the link between Horseshoe Crabs and humans through history. Includes timelines of milestone events.
Other
Horseshoe Crabs and Connection to Shorebirds
A description of the link between the horseshoe crab life cycle and shorebird migrations. Worth checking out for information on both kinds of organism.
Other
Horseshoe Crab: History and Biology
Resource is filled with lots of information presented in an easy to follow format. Illustrations are excellent.
NOAA
Noaa: Estuaries 101 Curriculum: Hooray for Horseshoe Crabs
Learn about the anatomy and ecological relationships of the horseshoe crab.
Regents of the University of Michigan
Animal Diversity Web: Class Merostomata (Horseshoe Crab)
Find general information about the Merostomata class, which includes horseshoe crabs and the extinct eurypterids. Topics include diet, body charactersitics, and respiratory system.
Smithsonian Institution
Smithsonian National Zoo: Zoogoer Magazine: Crabs in the Crossfire
This article addresses facts and information related to the Horseshoe Crab. In addition to general information, the article touches on conservation efforts and populations trends.
A-Z Animals
A Z Animals: Animal Facts: Horseshoe Crab (Limulidae)
This entry identifies the defining characteristics of the Limulidae, otherwise known as the horseshoe crab.
Read Works
Read Works: Blue Bloods of the Sea
[Free Registration/Login Required] An informational text about horseshoe crabs. A question sheet is available to help students build skills in reading comprehension.
TED Talks
Ted: Ted Ed: Why Do We Harvest Horseshoe Crab Blood?
Elizabeth Cox illuminates the incredible properties of horseshoe crab blood.
Other
Beachnet: Horseshoe Crabs, the Ancient Mariners
Interesting facts and figures about horseshoe crabs, including information about mating, reproduction, pictures, and a link to the University of Delaware's page on Horseshoe Crabs.