This image is of seaweed washed up at Point Pleasant Park in late May. Different types of seaweed reflect IR differently — so do different plant parts. In this image, tree twigs are mixed up with a type of seaweed commonly known as rockweed (Ascophyllum nodosum). Visually, those were of the same colour of green, but in infrared, the twigs came out a blue while the seaweed became very white.
(Near-infrared photography is also used as a scientific and a mapping tool to identify vegetation and land cover over terrestrial surfaces of the planet as well as algal blooms in lakes.)