Wondersurf 
The River Trout
Beautifully camouflaged and formed!
Imagine you are standing on a bridge and are looking into the water of a stream or a small river.
There! Suddenly a quick shadow races through the water. You look closer and you discover ...
... a fish that doesn't move in the middle of the current and waits next to a stone. Then suddenly it comes up in a flash, grabs an insect and disappears into the current.
It is very likely that you have discovered a river trout.