great green turban; Turbo marmoratus
A large marine snail with a thick, often iridescent shell; found in the Indo-Pacific. The shell is used for decorative purposes.
In Okinawa, great green turban shells are sold as souvenirs.
The great green turban is a type of sea snail that is active at night.
Katakana spelling is common for this shellfish name; usually written in kana.
Kanji spelling is also used, especially in formal or scientific contexts, but kana is more common.
The name developed from 屋久貝, referring to Yakushima, once an important source of the shell. 夜光貝 is a later spelling.