What did Jonah wear on his head while he was in the belly of the whale?

He did have seaweed wrapped around his head

First it was weeds and then a vine.

'...the weeds were wrapped about my head...' said Jonah

The Lord God prepared a vine, and made it to grow up over Jonah, to make shade for his head, to comfort him. Jonah greatly appreciated the vine.
(Perhaps it was a wine, grape vine! :) )

Addendum:
'God awaits your return. And the story of Jonah reminds us that we don't want to wait for Him to come after us...'

( So watch out!)
Jocular expression with respect. K

But Jonah did'nt get the vine covering 'gourd plant' (Jonah 4:6) untill long after he was in the whale. Also, no where in the Bible does it say that he was swallawed by a 'whale', but rather by a 'large fish' (Jonah 2:1).

Bob, the question say '...while he was in the belly ...'


Perhaps the answer then is 'hair.'