The v-shaped valley that lies along the bottom of the ocean is called a submarine canyon.

Here's why:

* V-shape: Submarine canyons are characterized by their steep, V-shaped profiles, similar to canyons found on land.

* Location: They are found along the continental shelf and slope, cutting down into the ocean floor.

* Formation: These canyons are primarily formed by erosion, often caused by turbidity currents (fast-moving underwater flows of sediment).

While they are not technically "valleys" in the same sense as those on land, the term "submarine canyon" is widely used to describe these features.