foreign countries, and the only place where non-Japanese aliens could reside. Jan Cock Blomhoff, the Dutch East India Company director stationed in Dejima, Nagasaki is known to have acquired merfolk mummies; these and other specimens are now held in the National Museum of Ethnology in Leiden, Netherlands. The equivalent industry in Europe was the Jenny Haniver made from dried rays. In the middle of the 17th century, John Tradescant the elder created a wunderkammer (called Tradescant's Ark) in which he displayed, among other things, a "mermaid's hand". Mermaid shows Scantily clad women placed in watertanks and impersonating mermaids performed at the 1939 New York World's Fair. It was part of the "Dream of Venus" installation by Surrealist artist Salvador Dalí. The mermaid interacted with Oscar the Obscene Octopus, and the ongoings were portrayed in E. L. Doctorow's novel World's Fair. Professional female divers have performed as mermaids at Florida's Weeki Wachee Springs since 1947. The state park calls itself "The Only City of Live Mermaids" and was extremely popular in the 1960s, drawing almost one million tourists per year. Most of the current performers work part-time while attending college, and all are certified Scuba divers. They wear fabric tails and perform aquatic ballet (while holding their breath) for an audience in an underwater stage with glass walls. Children often ask if the "mermaids" are real. The park's PR director says, "Just like with Santa Claus or any other mythical character, we always say yes. We're not going to tell them they're not real". The Ama are Japanese skin divers, predominantly women, who traditionally dive for shellfish and seaweed wearing only a loincloth and who have been in action for at least 2,000 years. Starting in the twentieth century, they have increasingly been regarded as a tourist attraction. They operate off reefs near the shore, and some perform for sightseers instead of diving to collect a harvest. They have been romanticized as mermaids. Scientific inquiry The topic of mermaids in earnest has arisen in several instances of scientific scrutiny, including a biological assessment of the unlikelihood of the supposed evolutionary biology of the mermaid on the popular marine science website DeepSeaNews. Five of the primary reasons listed as to why mermaids do not fit current evolutionary understanding are: thermoregulation (adaptations for regulating body heat); evolutionary mismatch; reproductive challenges; digestive differences between mammals and fish; lack of physical evidence. Mermaids were also