lantern shell
A type of bivalve mollusk; the Japanese name refers to its resemblance to an old man's face (翁).
The lantern shell was named because the pattern on its shell resembles an old man's face.
The name 翁貝 (おきながい) literally means 'old man shell', from 翁 (old man) + 貝 (shell), referring to the shell's appearance.