She stares in quiet contemplation for a moment before answering.

"Maybe the weight of the skull itself. Without muscles to support it, it cracked from the weight." She likes that answer better than the thought that something huge happened to affect the sea life, but the way things have been going, she bets her guess isn't correct.

Turning to the scholar, she asks, "What's your name?" If there were introductions on the ship, she missed out by being preoccupied with something else.