Mandarinfish Produces Blue Pigment
Jim Trodel / Flickr, Tiny Fox Lab

The mandarinfish is one of just two confirmed species in the world that can produce its own blue colouring. The mandarindish produces “cyanophores” – blue pigmented, light-reflecting cells – to achieve its vibrant colouring.Tiny Fox Lab Facts

Preview photo credit: Jim Trodel / Flickr
Source: https://www.australiangeographic.com.au/blogs/creatura-blog/2015/05/beware-of-the-beautiful-but-poisonous-mandarinfish