Miller Studios seems to have been the big maker of chalkware fish back in the day. I also spotted another manufacturer, Freeman McFarlin. There is a very healthy trade in chalkware fish — they so speak to the period. They can be picked up very inexpensively, but of course there are rare and expensive sets as well. Above: Gotta love this pair Miller Studios chalkware fishes from frenzyfinds on etsy.com.
Pink Miller Studio chalkware fish with bubbles from nenerzlife on etsy.
Multicolored Miller fishes from the cherrychic on etsy.
Aqua and white chalkware fish and shells from ACollectibleCachet on etsy.