The tones are produced by testosterone, and the males become more colourful as they age, with the highest ranking in the group bearing the brightest faces.
With acid yellow bodies covered in protruding spikes, called tubercles, the caterpillar can deliver a puncture three times as painful as a bee sting.
Native to Australia, they only wear their colourful outfits for a few weeks. After pupating, the caterpillar transforms into a dull brown moth.
As well as being one of the most brightly coloured creatures in the sea, this tiny octopus is also one of the most deadly species in the world.
Dominated by blue with orange, red or yellow wavy lines, the Mandarin fish is native to the Pacific Ocean.
