Curated OER
A Fish by Any Other Name-Language Activity
In this language worksheet, students try to match the names of 13 sea creatures with their names in languages other than English. Answers appear at the bottom of the page.
NOAA
Noaa: Estuaries 101 Curriculum: Hooray for Horseshoe Crabs
Learn about the anatomy and ecological relationships of the horseshoe crab.
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.
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.
TED Talks
Ted: Ted Ed: Why Do We Harvest Horseshoe Crab Blood?
Elizabeth Cox illuminates the incredible properties of horseshoe crab blood.
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.
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.
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.
Encyclopedia of Life
Encyclopedia of Life: Horseshoe Crab
The Encyclopedia of Life presents this in-depth overview of Horseshoe Crabs (Limulus polyphemus), including their habitats, size, conservation status, and much more. Images of this species and maps of its global distribution can also be...
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.
Other
Horseshoe Crab: History and Biology
Resource is filled with lots of information presented in an easy to follow format. Illustrations are excellent.
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.
PBS
Pbs: Nature: Crash: A Tale of Two Species
A documentary film about the horseshoe crab and its importance to a tiny shorebird known as the red knot bird. Human threats to the crab will directly threaten both the crab and the little bird who depends on it. Links to related topics...
PBS
Pbs Learning Media: Marathon Migrators
This video segment from NOVA: "The Mystery of Animal Pathfinders" explores how the migratory patterns of shorebirds have evolved to coincide with the spawning of horseshoe crabs. [6:00]
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.
Biology 4 kids
Biology4 Kids: Spiders and Scorpions More Arthropods
Spiders, scorpions, and horseshoe crabs are featured as arthropods.
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