Summarize the given story below.
Once upon a time, there was a princess who lived in a kingdom near the sea. She had many magical powers, but her greatest one was the ability to turn into a beautiful mermaid. She would often swim in the kingdom's bay and explore the nearby ocean.
The story is about a princess with magical powers who lived near the sea and had the ability to transform into a mermaid and would often swim and explore the ocean.
Complete the following task based on the instruction and optional input provided.### Instruction:
Summarize the given story below.

### Input:
Once upon a time, there was a princess who lived in a kingdom near the sea. She had many magical powers, but her greatest one was the ability to turn into a beautiful mermaid. She would often swim in the kingdom's bay and explore the nearby ocean.

### Output:
The story is about a princess with magical powers who lived near the sea and had the ability to transform into a mermaid and would often swim and explore the ocean.