YOU SAID:

the cat sat on the dog back as it swam across the ocean of death and destruction

INTO JAPANESE

それは死と破壊の海を泳ぎ回ったように猫は犬の上に座っていた

BACK INTO ENGLISH

The cat was sitting on the dog as it swam around the sea of death and destruction

INTO JAPANESE

猫は、死と破壊の海を泳いでいる犬の上に座っていました

BACK INTO ENGLISH

The cat sat on a dog swimming in the sea of death and destruction

INTO JAPANESE

猫は、死と破壊の海で泳いでいる犬に座っていました

BACK INTO ENGLISH

The cat sat on a dog swimming in the sea of death and destruction