It's the one that takes the greatest care of the fish.
The use of force has to be weighed with the greatest care.
"Wait until day; but we must watch with the greatest care."
Of course Peter stopped right where he was and took the greatest care not to move or make a sound.
We should always take the greatest care in protecting them.
He spoke clearly, choosing every word with the greatest care.
Again she chose her guest list with the greatest care.
And when you attend their service, take the greatest care.
This is a general social issue and must be treated with the greatest care.
In any case, I have tried to treat this important matter with the greatest possible care.