Leaves are stalked, alternate, with a lanceolate or falcate shape. Fruits are oblong or ellipsoidal; they are strongly curved, falcate, bent or lunate shaped. The large pectoral fins are falcate and pointed. The pectoral fins are moderately short, narrow, and falcate (sickle-shaped). The pectoral fins are large and narrowly falcate (sickle-shaped), tapering to points. The pectoral fins are narrow and falcate (sickle-shaped). The small pectoral fins are falcate (sickle-shaped) with relatively pointed tips. The pectoral and pelvic fins are not falcate, rather having nearly straight rear margins. The long and narrow pectoral fins are falcate (sickle-shaped) with pointed tips. The dorsal fin of the humpback dolphin is to some degree falcate. The first dorsal fin is high and falcate (sickle-shaped). The pectoral fins are large, pointed, and falcate (sickle-shaped). The body is deepest in front of the two tall and falcate (sickle-shaped) dorsal fins. All of the fins, particularly the narrow pectoral fins, are falcate (sickle-shaped) to some degree. The apex may be rounded, pointed, or falcate (produced and concave below).