bidirectionalswimmer

2. A robotic or mechanical device designed to move through water in both forward and reverse directions.

The underwater drone is a bidirectional swimmer used to inspect pipes.

3. A person who can swim competently in either direction along a marked course.

As a bidirectional swimmer, she easily completed the back-and-forth lap.

4. A microorganism that propels itself using flagella that can reverse rotation.

The bacterium is a bidirectional swimmer, changing direction by reversing its flagella.

5. A swimmer trained to move both with and against a current.

The rescue team needed a bidirectional swimmer for the river mission.