Drain trout and save liquid.

In a stainless steel bowl, mix together trout, flour, baking powder, baking soda, salt and one egg. Mix together gently.

Heat high temp cooking oil in a high sided pot and bring to 300 degrees (you can test this by dropping a small bit of batter as a test)

Fry fritters in small batches by dropping them into the oil with two spoons. Turn them as they become a golden brown on each side.

Drain on a piece of paper towel and lightly season, Serve with some Aioli with the reserved liquid swirled into the top