The marine biome characterized by deep water depths that never receive sunlight is the Abyssal Zone.

Here's why:

* Deepest Zone: The Abyssal Zone is the deepest part of the ocean, extending from about 4,000 meters (13,000 feet) to the ocean floor.

* No Sunlight: Due to its immense depth, sunlight cannot penetrate to this zone. This creates a perpetually dark environment.

* Unique Adaptations: Life in the Abyssal Zone is highly specialized. Organisms have adapted to extreme pressure, cold temperatures, and the absence of light.

Let me know if you have any other questions about marine biomes!