Snork is not only Snorkmaidens brother, also the whole of its kind to their name.
The original Tove Jansson in the Moomin books about the Snork otuksina closely related muumeille.The Snork in the books also change color according to emotion. Snork appears in only two of the Moomin books: Comet in Moominland and Finn Family Moomintroll.
Snorks and Moomins
Moomintroll first met the Snork and the Snork Maiden in the second Moomin book, the 1946 novel Comet in Moominland. As Moomintroll, Snufkin and Sniff travel to the Observatory to learn about the approaching comet, Snufkin mentions that he met a couple of Snorks a few months ago. When Moomin asks what Snorks are, Snufkin is surprised:
"Don't you really know what a Snork is?" said Snufkin in amazement. "They must be the same family as you, I should think, because they look the same, except that they aren't often white. They can be any colour in the world (like an Easter egg), and they change colour when they get upset."
Moomintroll looked quite angry. "Well!" he said. I've never heard of that branch of the family. A real Moomintroll is always white. Changing colour indeed! What an idea!"
As Snufkin describes, when they're feeling relaxed, the Snork's natural color is mauve, and the Snork Maiden is pale green. Later, when Moomintroll rescues the pair from a poisonous Angostura bush, the Snork is "green with terror", and afterwards, when Moomin has returned the Snork Maiden's missing anklet, she turns "quite pink with pleasure." When she begins to worry about the comet, the Snork Maiden turns from pink to mauve. By this time, Moomintroll has forgotten his earlier prejudice against color-changing Snorks, and is overwhelmed by the Snork Maiden's beauty.