* Descriptive: "The colorful coral reefs were a vibrant sight under the sea."
* Figurative: "Her worries seemed to disappear under the sea of laughter."
* Literal: "The submarine explored the mysterious creatures living under the sea."
* With a specific location: "We spent our vacation exploring the underwater wonders under the sea off the coast of Australia."
You can also use it in a question: "What amazing creatures can be found under the sea?"