Ancient dog-size sea scorpion unearthed in China. In China a 3.3-foot-long sea scorpion prowled the seas of what is now China some of what is now China some 435 million years ago using its giant spiny arms to ensnare prey archaeologists recently discover the remains of this scorpion tiropteroshoshamensis which was a Europe turret an ancient arthropod closely related to modern arachnids and horseshoe crabs the fearsome beastie lived during the Silurian period between approximately 443.8 million and 419.2  years ago this time the scorpions would have been the apex predator in there underwater stalking grounds pouncing on unsuspecting  fish and scooping them up in their petnaps and shoving them into their months eurypterids came in many sizes with the smallest about the size of a human hand and the largest as big as an adult human its barbed limbs were presumably used for prey capture and analogies can be drawn with a catching basket formed by the spiny pet up helps of whip spiders among the arachnids pedipalps are the front-most appendages of arachnids usually dedicated to transferring sperm for male spider to female mates in some arachnids such as whip spiders Peta palps have become adapted to snatch prey

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