Trout are a plentiful species of fish that can be found in rivers and streams worldwide. Grilled trout are a good source of vitamin B12, thiamine, riboflavin, niacin, phosphorous, manganese and selenium. These fish have delicate meat that tastes smoky and savory when grilled. You can clean and prepare a trout for grilling in a few steps, and the entire process should only take approximately five minutes.