Download Learnerz IAS app from the Play Store now! Download



Horseshoe crabs UPSC NOTE

 Why in news 

  • Environmental groups on Monday petitioned the U.S. government seeking endangered species protection for the American horseshoe crab, a "living fossil" under threat from commercial harvests for bait and biomedical use as well as from habitat loss and climate change.

  • These spine-tailed sea creatures named for the shape of their body shells have been crawling ashore since long before the age of dinosaurs, and in modern times were a familiar sight to summer beachgoers along the U.S. mid-Atlantic and Gulf Coasts.

Horseshoe crabs

  • Horseshoe Crabs are the living Fossils with Fascinating Features.

  • Horseshoe crabs are ancient creatures, often referred to as living fossils, that have been roaming the Earth for over 300 million years – even predating dinosaurs.

  • Despite their name, they are not true crabs or crustaceans, but rather chelicerates, more closely related to spiders and scorpions.


  • Horseshoe-shaped carapace: Their hard exoskeleton resembles a horseshoe, hence the name.

European Free Trade Association

  • 10 legs: They use 8 for walking and 2 for grasping food.

  • Tail spine: A long, spiky tail for defense and balance.

  • Multiple eyes: They have several eye types, including compound eyes for vision and median eyes for UV light detection.

Habitat and Lifestyle:

  • Marine and brackish waters: Found on sandy or muddy bottoms along coasts.

  • Scavengers: They feed on worms, mollusks, and other small prey using their chelicerae.

  • Breeding rituals: Mass gatherings on beaches during high tides, with females laying thousands of eggs.

  • Molting: They shed their exoskeleton multiple times as they grow.

  • Long lifespan: They can live for over 20 years.



Amritsar,1,April 2024,171,Art & Culture,1,August 2023,251,Courses,7,Daily Current Affairs,48,December 2023,189,Disaster Management,2,Environment and Ecology,54,February 2024,228,Foundation Course,1,GDP,1,GEMS Club,1,GEMS Plus,1,Geography,67,Govt Schemes,2,GST,1,History,2,Home,3,IAS Booklist,1,Important News,71,Indian Economy,46,Indian History,2,Indian Polity,56,International Organisation,12,International Relations,58,Invasive Plant,1,January 2024,240,July 2023,281,June 2022,6,June 2023,268,March 2024,238,May 2022,17,Mentorship,2,November 2023,169,October 2023,203,Places in News,2,Science & Technology,66,September 2023,205,UPSC CSE,111,
Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Horseshoe crabs UPSC NOTE
Horseshoe crabs UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content