Crevice Spiny-Tailed Lizards belong to the Agamide family, and they are popular among pet lovers all over the world. However, many species fail to survive transportation, or become stressed in captivity. Therefore, it is recommended to buy captive born lizards. There are several types of Spiny-Tailed Lizards, and they differ in size and behavior. These lizards use their well-armored tails as defensive weapons when hiding in crevices.