had been finning

• past perfect progressive

  past perfect progressive

  Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.

  of fin.
  fin

  noun

  a membranous, winglike or paddlelike organ attached to any of various parts of the body of fishes and certain other aquatic animals, used for propulsion, steering, or balancing.

More Suggestions

• free-running
• hand-running
• nitrogen-fixing
• underpinning