What type of figurative language is the ocean is a sheet of glass reflecting the light of the Moon?

The phrase "the ocean is a sheet of glass reflecting the light of the Moon" employs a metaphor, as it directly compares the ocean to a sheet of glass without using "like" or "as." This figurative language creates a vivid image, suggesting the ocean's calm surface and reflective quality. Additionally, it evokes a sense of tranquility and beauty associated with the scene.