Fangtooth is one of the three skins released in the fourth part of the MadJawZ's Shop offer. It could be purchased as part of an item deal in mid March 2020.
Fangtooth could be purchased for $14.99 in the limited time "Best Deal!" which included 28000 coins, 1800 DNA and the Attabouy skin. This skin was not available for individual purchase and may not be available for purchase in the future.
Details of this skin may vary depending on location, platform or time.