A Gaetice depressus, right, and its exuviae seem smiling in this undated handout photo from Toba Aquarium in Toba, Mie prefecture, western Japan. An 8-year-old boy picked the Gaetice depressus with about 1.5 cm shell on Aug. 30, 2003 when he went digging for clams at a beach in the prefecture and brought it to the aquarium. Employees at the aquarium doubted first that it was drawn by permanent marker but kept it. Even after the Gaetice depressus exuviated on Sept. 21, 2003, it still has the pattern like smiling clearly and it was proved that the pattern is by nature. The aquarium opened it to public Friday, Sept. 26, 2003. (AP Photo/Toba Aquarium via Kyodo News)

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