Then he gasped and pointed to the spot where Frank was hiding. “Oh, no! Frank is turning into a crazy dolphin!”
Nothing happened.
“I said,” Percy repeated, “Frank is turning into a crazy dolphin!”
Frank stumbled out of nowhere, making a big show of grabbing his throat. “Oh, no,” he said, like he was reading from a teleprompter. “I am turning into a crazy dolphin.”
He began to change, his nose elongating into a snout, his skin becoming sleek and gray. He fell to the deck as a dolphin, his tail thumping against the boards.
The pirate crew disbanded in terror, chattering and clicking as they dropped their weapons, forgot the captives, ignored Chrysaor’s orders, and jumped overboard.

The Mark of Athena, Chapter XXXI