When taking a walk in my neighborhood early in the morning, I saw two soft-shelled turtles. The first one was very big and quickly ran away as soon as it found me. The second one was not so big and was hiding in mud.
A soft-shelled turtle is called “sup-pon (すっぽん)” in Japanese. In Japan, a tool consisting of a stick with a rubber suction cup at one end is also called “sup-pon.” This is probably due to the similarity between the shapes of the former and the latter.