ERIKA LAU

Preserving common smooth hounds (Mustelus mustelus) at the Natural History Museum in London. ​ Specimens are placed in a solution of formalin for several days, preventing the body contents from spoiling.​ The curator takes the specimens out of the fixative and washes them thoroughly. He labels them with the names of the species and the collector, then placing them into a tank of 70% ethyl alcohol for preservation.