Grimlahdi are medium-sized reptiloids originating on Grimlahd. Their general appearance bears some resemblance to bipedal iguanas in that they have scaly skin, nonretractable claws, a whiplike tail, and headspines. In addition, their tongues are forked like those of snakes. Eye color may range from brown to dark blue to light gray. Scale colors are typically earth tones or dark green, with slight color variation between front and back sides.