“This isn’t over, Jackson,” Chrysaor growled. “I will have my revenge—”
His words were cut short by Frank, who had changed form again. An eight-hundred-pound grizzly bear can definitely break up a conversation. He sideswiped Chrysaor and raked the golden mask off his helmet. Chrysaor screamed, instantly covering his face with his arms and tumbling into the water.
They ran to the rail. Chrysaor had disappeared. Percy thought about chasing him, but he didn’t know these waters, and he didn’t want to confront that guy alone again.

The Mark of Athena, Chapter XXXI