Eel weirdness - part 2

Some r-eel-y good studies trying to figure out the eel-usive Eel

A portrait of the neurophysiologist as a young man: Clause, Darwin, and Sigmund Freud's search for the testes of the Eel (1875-1877) by Matthew Perkins-McVey (2022)

Sur la maturation complete des organes genitaux de l'anguille male et l'emission spontanee by M Fontaine (1936)