I present, The Queen of the Inktails.
Species description:
Inktails, as their name suggests, are able to produce ink from the tip of their tail. Only the Queen is capable of the special rainbow coloured ink whilst any other inktail can only produce one colour from birth. Each child is born with a blended colour of their parents, leading only identical twins to have the same colour.
No two Inktails posses the same colour as there are 18 decillion colours of various shades and hues.

Inktails created and owned by  CuteSharkByte