Enuma Elish

The Enuma Elish was written before Genesis, and it has some similarities with the biblical account (e.g. watery chaos, separated into heaven and earth, light exists before creation, succession of events, etc.). For instance, in the Babylonian account of creation Marduk killed the goddess Tiamat (the salty sea) and used her carcass to create heaven and earth (see NET note). Critics (like Gunkel and Otzen) argue that Moses copied his creation story from the Babylonians? Is this the case?