Gaghiel was rather intelligent, for an Angel of his age. When he had learned that the planet they had been born onto was composed mostly of water, he had taken an aquatic form in order to hunt down and bond with Adam more easily.
It really wasn't his fault, therefore, that he was nearly totally incapable of assaulting the fortress city of Tokyo-3, where he could sense the signature power of an egg and its associated progenitor. At the moment, he was lurking several hundred miles off of the coast of Japan, pondering his options.
He'd circled around, trying to see if there was some sort of marine inlet to the city, but unless he wanted to try and squeeze his aircraft carrier sized bulk up a sewage pipe, that was looking like a solid negative.
By this point, he was frustrated enough to consider heaving himself up on the beach and dragging himself across the ground, but he was pretty sure that whatever was defending the progenitor would carve him into fillets, much as it had apparently done to Sachiel, Shamshel and Ramiel.
As he debated going back to sleep for another few thousand years and seeing if things had changed or one of his siblings had seized the progenitor, the Angel of fish suddenly felt something appear almost half way around the planet that felt almost exactly the same as whatever was being held on the island he'd been circling for the past few weeks.
Giving the angelic equivalent of a shrug, the massive sea creature adjusted his course, and started towards this new feeling as quickly as he could. After all, there was a better than average chance that it would be in the water, and three other Angels hadn't disappeared mysteriously trying to get it.