This strange fish has many unique features, but one of the most prominent, the trait for which it is commonly named, is its bright red lips 9. This red or pink coloration can extend to the lower surface of the fish as well as the two dorsal stripes that trace along the fish’s body 5. Aside from this comical coloration, the O. darwini sports limb like appendages 9 formed by the pelvic and pectoral fins, and a horizontally protruding snout that is equally high as it is wide 5, with a horn with a few short hairs 12. This horn also contains a fish-lure 12 in a small cavity. It has fine, needle-like, villiform teeth, and the tongue is covered by dentate 2 area partially divided by a groove 5. More generally, it has a flattened, disk shaped body, sandpaper-like skin, a fine, prickly but velvety, shagreen covering 5, 4 dorsal rays and 3 anal rays, and typically grows to around 25 cm 9.