Category: Uncategorized

Good Bye!

Good Morning! My name is John Limjoco. I am an 8th grader that is graduating from Haddonfield Friends School. This is such a bittersweet moment as my classmates, or family, go our separate ways. Although I don’t have viewers on this site I will keep this site in memory of all the fun times I had in tech. I will never forget this class, thanks so much for all who did take the time to view my site. John Limjoco Signing Out!

Horseshoe Crabs

          The horseshoe crab is an extraordinary creature.  These horseshoe crabs are very important to the ecology.  Fifty percent (50%) of shorebirds’ diet is based on horseshoe crab eggs.  Also, they are important to the biomedical industry because of their blood.  They are also one of the world’s oldest creatures.  They have been existing longer than the dinosaurs!  In my opinion, I think that horseshoe crabs are very interesting.

Horseshoe crabs have an interesting body.  Their body has three parts, the head, abdomen, and the telson.  The head contains the mouth, brain, heart, nervous system, and glands.  Also, the head protects the largest eyes.  A horseshoe crab contains 9 eyes scattered throughout its body!  The Abdomen includes moveable spines on the side to help protect the horseshoe crab.  On the bottom of the abdomen there are muscles for moving and gills for breathing.  The telson is the tail.  The tail is not meant for harm.  The tail is there so horseshoe crabs can flip back up if it gets knocked on its back.  In conclusion, horseshoe crabs have interesting bodies.

          Horseshoe crabs’ history go back a very long time.  They have been on Earth for over 300,000,000 years!  That is before dinosaurs, the dawn of humans, and flowering plants existed!  They existed in the era when the first visible life existed.  Many scientists have a hard time figuring out when these creatures first existed.  They do know that horseshoe crabs go back over 510 million years ago with a group called the Xiphosura.  Horseshoe crabs have an unclear history, but scientists know for a fact that they have been existing for over hundreds of millions of years.

          Horseshoe crabs’  migration have a lot to do with mating.  During the months of May and June horseshoe crabs go on to shore.  Some male horseshoe crabs go to the bottom of the ocean!  When its time to mate males migrate on to shore.  They get their first.  Then, the females come and the males drag them with their pincers.  Then, the females make holes for their eggs and lay eggs.  The males then fertilize the eggs.  A female can lay over 3,000 eggs in one nest, and 88,000 eggs in one season.  After that it is all about chances.  Half of the eggs will be eaten before they even hatch.  These horseshoe crabs have a very interesting life.  I hope that they are still around for the next generation to see.

 

Horseshoe crabs are amazing creatures and we should try to do what we can to save them and other endangered animals.  Thanks for reading this post