Antique Fish-Shaped Obi Clasp (Originally a Tie Clip?)

Purchased at an antique market.
A shiny fish-shaped obi clasp, with a white and gold design.
It is believed to be a tie clip, but I used it as an obi clasp several times.

- Design: Fish-shaped obi clasp
- Material: Unknown, but shiny material (I believe it's shell.)
- Color: Combination of white and gold
- Decoration: Can be attached to a gold obi

Thank you for looking.