Dark Side Earth on Instagram: "The leptocephalus is the clear, ribbon-like larval form of eels and certain other fish such as tarpons and bonefish. For eels, including the European eel (Anguilla anguilla) and American eel (Anguilla rostrata), this stage begins right after hatching and can last anywhere from several months to over a year. Leptocephali are flat, leaf-shaped, and nearly invisible in the water because of their transparency. They drift vast distances on ocean currents before developi