proteus

A sea god who could change his shape at will.Greek

• "I am known as the Old Man of the Sea, but back in my day, people called me Proteus. "No way!" Egan said. "This guy had Poseidon's job before Poseidon."

The sixth satellite of the planet Neptune.

Any of many gram-negative bacteria, of the genus Proteus, several of which are responsible for human infections.