The horseshoe crab holds a special place in many people’s hearts who live along the Atlantic Coast area of the United States, particularly the Delaware Bay. Other locations around the globe such as the Indian Ocean plus more are shown in the map below. Every Spring when these time-tested creatures show up by the thousands to spawn, it’s a sight to behold. Although, I do not live in any of these regions, the famed yearly event has reached the attention and interest of my eyes, ears and heart.
Because they date back to the Paleozoic Era over 400 million years ago, I chose to include the horseshoe crab for one of my story characters in the book I completely recently called “Under the Sea Time Forgot”. Her name is Breeva and she is a close cousin to another character in the story since both are arthropods with segmented bodies, jointed limbs and an external skeleton called an exoskeleton.
Through my research, the horseshoe crab has become close to my heart too and I found myself feeling very sympathetic to their modern day plight. Man is going to blow it if he doesn’t wise up. An animal such as the horseshoe crab having survived millions of years through multiple mass extinctions deserves our respect. Because of over harvesting, abuse, habitat disappearance, pollution and their use as bait, the horsehoe crab is close to being on the threatened list. That would be a crime!
Help to Humans:
The horseshoe crab blood contains copper which gives it the blue color, but more important, their blood contains an ingredient used to test pharmaceutics for impurities. The industry claims this does not harm the animal, but some sources debate that.
Horseshoe crabs are simple primitive creatures which haven’t changed much in over 400 million years.
* Science believes they have survived the eons for several reasons:
1) the size and shape of their exoskeleton shield
2) they can go a year without food
3) they adapt to high salt environments and extreme temperatures
4) their unique blood protects them from infection
* They are gentle animals, non-threatening to humans
* They can breathe in and out of water due to bi-functional book gills that resemble pages of a book
* Their thousands of eggs are vital to the survival of migratory birds and other sea animals
Horseshoe crab Global Distribution
CLASSIFICATION OF HORSESHOE CRAB
- Kingdom: Animalia
- Phylum: Arthopoda (Animal having an external skeleton, segmented body and jointed legs)
- Subphylum: Chelicerata (Small appendages to form pincers used to feed)
- Class: Merostomato (Separates the Horseshoe crab from Eurypterids (extinct sea scorpions)
- Order: Xiphosura (Includes extinct and modern Chelicerates)
- Family: Limulidae (Modern horseshoe crab)
- Genera Limulus (Atlantic horseshoe crab)
- Species Polyphemus (Atlantic horseshoe crab)