The first ancestors of horseshoe crabs are believed to have evolved approximately 450 million years ago during the Ordovician period. These ancient arthropods are part of a lineage that has remained relatively unchanged for millions of years, making them one of the oldest living species on Earth. Their unique anatomy and physiology have allowed them to survive various mass extinctions and environmental changes throughout geological history.
Mangrove horseshoe crab was created in 1802.
Atlantic horseshoe crab was created in 1758.
The horseshoe crab closely relates to scorpions and spiders.
The horseshoe crab is about 2 feet long and weighs 10 pounds.
The spikes on a horseshoe crab protect it from being attacked.
a horseshoe crab is called a horshoe crab because its sell looks like the shape of a horseshoe posted byb Sean I
Horseshoe crabs are not a fish, it is a marine arthropod. The horseshoe crab is more closely related to spiders, ticks, and scorpions than to crabs.
it looks like a crab
A horseshoe crab is an invertebrate. It lacks a backbone or spine, which are characteristic features of vertebrates.
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