Vintage Faux Marcasite Fish with Ball Brooches

Lovely sparkly faux marcasite fish, with coloured balls in their mouths.
A fairy story ?

1.7cm tall, 5cm wide.
I have several different colours
Red fins and black ball
Green fins and black ball
Blue fins and red ball
Green fins and red ball
Green fins and blue ball
Choose which you'd like or wear the whole shoal.