If you’ve had the chance to spend an extended amount of time fishing a single Rocky Mountain freestone river, you may have noticed an interesting pattern: trout tend to partition the river by species.

These are the prettiest freshwater fish, from vibrant brook trout and pumpkinseed sunfish to majestic lake sturgeon. Check out how these species made our list!

Rainbow trout are the most common type of stocked trout, while golden rainbow trout are a unique hybrid species. Brook trout are the state fish and have a distinctive dark coloration with red spots ...

Scientists from Canada have found that transgenic Atlantic salmon can cross-breed with a closely related species ... transgenic hybrids grew faster than the wild salmon, wild trout and wild ...