A horseshoe crab.
As an adult, some may reach about 20 inches and if wounded indeed their blood is copper based and blue unlike most other blood.
The Horseshoe crabs that swim ashore each year to mate are almost exactly the same as those found in the fossil record dating back an estimated 300 million years or more according to scientists. That's 100 million years before the dinosaurs!
Studies of their unusual eyes have shown that they become much more receptive at night regulated by their own internal clock. One article even stated a million times more receptive! Even studied for years in total darkness, the eyes continue to adjust back and forth for night and day. Since they locate food primarily by chemical scent, the only useful purpose for the amazing eyes seems to be their use to locate mates during their short breeding cycle. Hence, they could honestly tell their mate (if they could speak) "I only have eyes for you."
Very hardy, they are almost impervious to pollution and are often the last living creatures in polluted bays. Staying unchanged over millions of years makes this creature an enigma to evolutionists who must try to explain why they did not evolve or change over such a long period.
Not really closely related to a crab, these creatures are more like spiders and scorpions.
The hint? .. the shoe you probably got, and beauty refers to the classical horse adventure story "Black Beauty".
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