"Mystery Bones of Infant Island" is a translation of the official Japanese name for the creature given on an officially licensed 2012 ornament of it produced by Cast. Cast later released an ornament for the skeletons lying around Skeleturtle in Mothra vs. Godzilla, which referred to them as the "Other Mystery Bones of Infant Island" (インファント島の別の怪骨. Officially licensed t-shirts featuring Skeleturtle that were sold in Japan refer to the creature in English as Infant Island's Kai Kotsu. "Skeleturtle" is a fanmade nickname, created by Chris Mirjahangir of Infanto-tō no Betsu no Kaikotsu)Toho Kingdom, before the official name was known. Another unofficial fan nickname for the creature, "Kame no Gaikotsu" (亀の骸骨, was coined by Miles Imhoff, also from Toho Kingdom. Kame no Gaikotsu, lit. Turtle Skeleton)
Skeleturtle is purely white and gray, with black eyes, and a bland, pale shell with no visible scutes. It has a fairly long neck, and very short limbs, which have tiny bone fragments visible. Though it could be interpreted as either a skeleton bobbing in the wind or a living creature moving its head back in forth in Mothra vs. Godzilla, it is unambiguously portrayed as a living creature in Godzilla: Rulers of Earth.
Within the context of Mothra vs. Godzilla, Skeleturtle's direct origins are unknown. It is possible that it was either a larger turtle killed by nuclear testing or a species of turtle affected by the atomic radiation contaminating Infant Island.
When Ichiro Sakai, Junko Nakanishi, and Professor Shunsuke Miura traveled to Infant Island to beg Mothra for help in defeating Godzilla, they witnessed how the island had been devastated by nuclear tests. Skeleturtle sat among the remains scattered around their landing site, although they did not remark on it.
- Main article: Skeleturtle/Gallery.
- Despite its obscurity, Skeleturtle received an officially licensed ornament from Cast in 2012, as well as an official t-shirt. Skeleturtle was also one of the first three monsters featured in Cast's new Godzilla Ornament Special Effects Collection Mini line in 2018.
- Skeleturtle's inclusion in Mothra vs. Godzilla may be a reference to a popular 1962 Italian documentary entitled Mondo Cane (It's a Dog's World). The film contains a large number of documented atrocities to nature and animals, including turtles on the radiation-contaminated Bikini Atoll beaches, many of which were dead or dying from the continued fallout from nuclear tests. The dried bones of the turtles move in the wind, which is reflected in Skeleturtle's movement in the film.
- Skeleturtle appears in the officially-licensed Godzilla book Shinji Nishikawa: Drawing Book of Godzilla, in little sketches made by Shinji Nishikawa on the inner back cover and the last page of the book.
This is a list of references for Skeleturtle. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: