The disappearing fish,
photographed by Iago Leonardo.
In the open ocean, there’s nowhere to hide, but the lookdown fish – a
name it probably gets from the steep profile of its head, with mouth set
low and large eyes high – is a master of camouflage. Recent research
suggests that it uses special platelets in its skin cells to reflect
polarised light (light moving in a single plane), making itself almost
invisible to predators and potential prey.
