Pink Buffalo is a Cubensis strain originally found in Thailand. According to legend, the man who named it and went on to popularize it internationally actually found the mushrooms in a field where a pink buffalo was grazing (that is possible, as an online search for “pink buffalo animal” will attest).
The strain is said to be on the more potent side, as implied by the deep blue color that develops when the stems are bruised or cut. The caps tend to be a bit dark. Pink buffalo is also considered quite easy to cultivate.