Bitterling

The Bitterling is a small, colorful freshwater fish, primarily featuring hues of silver, green, and red, particularly vivid in breeding males. Originating from Europe and Asia, it's distinguished by its elongated body and the unique breeding behavior involving freshwater mussels. While it exhibits striking colors and an intriguing life cycle, it is not among the most well-known in the aquarium hobby, partly because of its specific breeding requirements. Nonetheless, its subtle beauty and fascinating behavior can make it a rewarding choice for enthusiasts familiar with its care.