Caramel Reaper is a natural caramel-colored mutation from the red Carolina Reaper. This mutation may not be completely stable, which means variations of color and shape could still occur.
 
The Carolina Reaper was an intentional cross made between a Ghost Pepper and a Red Habanero by Ed Currie of PuckerButt Pepper Company. When it was first rated by Guinness it came in at 1,569,300 SHU (2013). Oddly, what hasn't been widely publicized is that it was re-tested in 2017 and rated even higher - coming in at 1,641,183 SHU.
 
This is how Puckerbutt Pepper Co. describes this its baby:

This pepper--the world's hottest--is beautiful bright red with a rough surface and a long stinger. But don't let its good looks fool you! This pepper got its name for a reason. If you are "stupit" enough to eat this pepper whole you may wish to enter the doors of death willingly! Be very, very careful using this pepper. Those who don't fear the Reaper are fools. Its Scoville rating is 1,569,300 SHU. Flavor has been described as sweet, fruity, with a hint of cinnamon with chocolate undertones. Uses include hot sauces, salsas, cooking, settling old scores and combat.
 
Sold in a 2.62" wide x 3.5" deep pot.
(Photo credit: Forgotten Heirlooms )