horseshoe crab

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horseshoe crab

Any of various marine arthropods of the order Xiphosurida, especially Limulus polyphemus of eastern North America, having a large rounded body and a stiff pointed tail. Also called king crab, limulus.

horseshoe crab

(Animals) any marine chelicerate arthropod of the genus Limulus, of North America and Asia, having a rounded heavily armoured body with a long pointed tail: class Merostomata. Also called: king crab

horse′shoe crab′

any of several large marine arthropods of the order Xiphosura, esp. Limulus polyphemus, of E North American shores, having a stiff tail and brown carapace curved like a horseshoe. Also called king crab.

horse·shoe crab

Any of various marine arthropods that have a large rounded shell that covers the body, two large compound eyes on the shell, and a stiff pointed tail. Horseshoe crabs are not in fact crabs, but belong to an ancient order of arthropods related to the spiders and extinct trilobites.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.horseshoe crab - large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tailhorseshoe crab - large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse
arthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
genus Limulus, Limulus - type genus of the family Limulidae
References in periodicals archive ?
Under the MEEF, some HK$6.3 million has been granted to six projects, with research subjects including Chinese White Dolphins, the impact of microplastics on Chinese horseshoe crabs, mangrove forests and the oyster population.
A quota system and several complete closures of coastal waters have been implemented for harvesting horseshoe crabs for the eel and whelk fisheries (ASMFC, 1998, 2012), and this led to a significant decrease in the commercial harvest levels of horseshoe crabs, from around 2 million crabs in 2000 to 600,000-700,000 crabs in 2014 (ASMFC, 2013).
DE 14 MJ k[g.sup.-1]) diets were formulated based on the results of the ideal combination of DP and energy levels, which was obtained from a previous nutritional requirement study of juvenile horseshoe crabs (Hu et al.
Sadly, there is not a single palm tree in sight, and the ocean is a foamy gray, but the trip provides plenty of adventures for the sisters, from discovering horseshoe crabs to helping release a falcon at a wildlife station and eating their first fried periwinkles--snails by any other name.
The four adult males who had been fishing were in possession of 2 monofilament gill nets, 8 undersized snook, 2 undersized red drum, 1 undersized sheepshead, 3 horseshoe crabs, and 2 coolers full of mullet.
Spiders, octopuses, squids and horseshoe crabs have blue blood.
"We can now explain why, for instance, horseshoe crabs have a reduced pair of limbs-the chilaria-at the back of their heads.
The author considers interactions between horseshoe crabs and humans, through fieldwork conducted between 2012 and 2016 at urban beaches near New York City, nature preserves in Japan, and marine research sites in Florida, and interviews with conservationists, field biologists, ecologists, and paleontologists.
One of the overall goals of this study was to test this hypothesis in horseshoe crabs, which express both a circadian rhythm of lateral eye sensitivity [17] and a circatidal rhythm of locomotion [10,18].
Larry went killeying as a boy, using horseshoe crabs as bait to catch the killeys.
Selangor, Malaysia, June 22, 2015 - (ACN Newswire) - Human activity is affecting the population of Asian horseshoe crabs in the state of Sabah in Malaysia, possibly by disrupting the male to female ratio - that is the conclusion of a study that surveyed two populations of Mangrove horseshoe crab (Carcinoscorpius rotundicauda) and studied their mating behaviour.