"A sea scorpion," Greta said. "Eurypteroid, to give it its formal name. It’s attacking that lump on the shoreline. That black slime is vegetation." More of the predator slid with paralytic slowness from the thin liquid. The twigs were now revealed as interlocking basketlike foreclaws that meshed together like saberteeth. "Its prey is gathering energy to leap. That will take a while. By the standards of this ecosystem, this is a lightning attack. Look at the size of its cephalothorax, Bela."