Jaws- Sharp Skin Cut

He felt the sandpaper
scrape of sharkskin again on his bare toes, and
crashed into the cockpit on his shoulder. He fought
himself to his feet and looked back.
...
He went back to the anchor chain. He heaved,
and heaved again, breath rasping and blood from
his lacerated toes splattering the deck, showing red
with each sweep of the Cape North light.

- Jaws 2, Page 285-286