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 . 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 . Aside from this comical coloration, the O. darwini sports limb like appendages formed by the pelvic and pectoral fins, and a horizontally protruding snout that is equally high as it is wide , with a horn with a few short hairs . This horn also contains a fish-lure in a small cavity. It has fine, needle-like, villiform teeth, and the tongue is covered by dentate area partially divided by a groove . More generally, it has a flattened, disk shaped body, sandpaper-like skin, a fine, prickly but velvety, shagreen covering , 4 dorsal rays and 3 anal rays, and typically grows to around 25 cm