Faucaria tigrina is one of those particular succulents that look scary yet adorable at the same time. This stemless succulent has plump, bright green, triangular leaves that grow alternately, forming a star-shaped rosette. The leaves grow in clumps and have sharp, menacing, teeth-like structures that could pass for an underwater predator on the National Geographic channel. These ‘teeth’ are what give this succulent the street names Tiger Jaws or Shark Jaws. There are about ten teeth on every leaf that serves as a defense mechanism. They also help the plant to trap water vapor from the atmosphere, taking it down to the roots of the plant.
Source: Succulent City