How Melanotan Peptides Work to Enhance Skin Tone and Promote Tanning Age Well ATL Green Frog Lithobates clamitans Maryland Biodiversity Project Green Frogs (Lithobates clamitans) are very territorial, especially the males. You can differentiate their sexes since they are dimorphic (showing observable differences in form, color, size, or structure between sexes). For example, Nasal sprays containing the 'Barbie Drug' melanotan are very, very dangerous and completely unregulated, according to leading dermatologist. Experts say there has been a surge in the use of the illegal tanning aid