"...there was not a man aboard who did not feel sick with apprehension when a huge fish, thirty-five to forty feet long, glided between them and the {diving-}bell, far too deep for any musket. It turned above the glass, darkening the day. 'That must be the big carcharodon,' said Stephen, looking up. 'Let us see what he will make of this.' He reached for the cock and let out a furious bubbling stream of used air. In a single swift movement the shark turned its vast bulk and was seen no more." --Patrick O'Brian, Treason's Harbour, 205
"...there was not a man aboard who did not feel sick with apprehension when a huge fish, thirty-five to forty feet long, glided between them and the {diving-}bell, far too deep for any musket. It turned above the glass, darkening the day. 'That must be the big carcharodon,' said Stephen, looking up. 'Let us see what he will make of this.' He reached for the cock and let out a furious bubbling stream of used air. In a single swift movement the shark turned its vast bulk and was seen no more."
--Patrick O'Brian, Treason's Harbour, 205
Literally, "ragged tooth"