Morris Olitsky wrote:

May I assume that fishing for sport is prohibited but that fishing for food is acceptable? Shalom

Dear Morris Olitsky,

You're right. Only fishing for food is permitted according to Halacha.

While it's considered 'sportsman-like' to put the fish back in the water, the Torah outlook is exactly the opposite. Do the fish a 'flavor': Eat it for Shabbat!