Check out my recent paper about handedness in guppies. Guppies that are strongly left or right handed (AKA lateralized) seem to have an advantage when it comes to shoaling, foraging, and evading predators. Se we’ve often assumed that there is strong selection for laterality in environments with lots of predators. But my work shows that guppies who are reared with predator chemical cues are more lateralized than their brothers reared without cues. Score another point for plasticity!