YOU SAID:

I jump from a boat in a ocean and found a shark

INTO JAPANESE

海でボートから飛び降りてサメを見つけた

BACK INTO ENGLISH

Jumped off the boat at the sea and found a shark

INTO JAPANESE

海でボートから飛び降りて、サメを見つけた

BACK INTO ENGLISH

Jumped off the boat at the sea, I found a shark

INTO JAPANESE

海でボートを飛び降りた、私はサメを見つけた

BACK INTO ENGLISH

Jumped off the boat at the sea, I found a shark