Megalograptus ("Big Writing") was a small eurypteriod of the Ordovician. These sea scorpions are famous for being among the first creatures to come onto dry land.
Megalograptus lived during the Ordovician between 460 to 445 million years ago.
These sea scorpions measured 6 feet long. Megalograptus belonged to a group of marine arthropods called eurypterids. These animals were marine scorpions which lacked the stinger on the tip of their tail and were replaced with a fluke. It had long arms with lots of spines ranging in size running down the length of them.
When it comes to breading, these creatures will move in the shadows, move towards the shore and produce a mass spawning. Whenever there is a full moon out and the highest tide comes in, they lay their eggs in the sand, the eggs will be protected and when the next high tide would come, probably in about a month or so, the young larvae will hatch and be taken back out to sea. Some of the sea scorpions would stay around on the shores and wait until the eggs would hatch. Some fossils have been found that baby sea scorpions have been found inside the stomach of the big ones. That’s what they do; they wait around the shore and feed on the babies as they hatch on the next high tide.