Insert the blade of the sword into its claw and turn it from a horizontal position to a vertical one (so that your finger doesn't get in the way). And you're good to go. Or kill this crab, as an option.
Although, I could have inserted a boar tusk into the claw in the same way; it's just that you made me think of it now. In any case, the crab wouldn't be able to bite through it.
The sailors successfully pry the crab off Odd's finger (219)

В тихой однообразной жизни всегда так бывает: каждый отдельный день бесконечно долог, но месяцы и годы мчатся с непостижимой быстротой.
I wanted to offer you some flowers, but a crown would suit a princess like you much better
Смысл жизни в том, что жизнь на тебе не заканчивается