The Proposal that Nudibranch Jorunna funebris 'Juvenile' is Precocious, a Distinct Phenotype or a New Species

During a survey of nudibranch diversity and abundance in Cambodian waters, two pairs of what has been heretofore regarded as the juvenile form of Jorunna funebris (Kelaart, 1859) were observed mating. At that time, it was not possible to collect specimens for further physiological investigation, so it cannot be concluded that this is actually a new species. This paper brings considerations from previous works to bear on the options that can explain this situation and suggests a course of action to investigate the hypotheses.