Also more commonly known as "Joseph's Coat", Opuntia tuna is a dwarf and monstrous variant of the larger prickly pear Opuntia monacantha. It is characterized by its shrubby habit (it looks like a small tree), which gives life to extraordinary "monstrous" shapes. It has long, smooth, flattened stems of a bright green color, covered with small hair-like spines, that detach as soon as it comes into contact with the plant. During the flowering season, it blooms with small red flowers.