History
What era did they start evolving?
What is Paleozoic era
How many eyes?
10 eyes
Where is the largest spawning ground
What is Deleware Bay
What protects the crabs against infections
What is their blood
What type of animals use the crabs shell as a home?
What are crustaceans
How many species have evolved from the horseshoe crab?
four
What are the three divisions to the body?
What are the prosoma, opisthosoma, and telson
How do horseshoe crabs grow larger?
They molt and shed their shell
What can the crabs blood test for?
What animal attaches itself to the bottom of a crab
What are mollusks
What is Mesozoic era?
What color is the horse crabs blood?
what is blue?
What percent of horseshoe crabs die from harvesting?
What is 15%
What major disease does their blood help cure?
What is E. coli
What type of animal uses the crabs eggs for food during their migration stop?
What are birds
What animals do they relate to closely?
What are trilobites that existed 544 million years ago
How many muscle groups do they have?
113
What is the largest cause of death?
What is bait fishing
Where can you find the amebocytes?
The white color at the bottom of the blood bottles
What animals use the crabs shells to lay eggs
What are snails
When did the evolution of horse crabs start?
Before the dinosaur era
How many enzymes are in their blood?
What tide do they burrow in the sand?
Where do most of the horseshoe come from?
Blood for hospitals is mostly taken is southeast Asia
What animal rests by the crabs gills?
Mollusks