Gangesiids [Gangesiidae]

Description

Gangesiidae is a family of tapeworms within the order Proteocephalidea, primarily known for their presence in freshwater environments, though some members are found in marine and brackish waters. These parasites have a distinct life cycle involving crustaceans as intermediate hosts and fish as definitive hosts. Gangesiids are characterized by their small size and the presence of a scolex with specialized attachment organs that secure the parasite to the host's intestinal mucosa. Despite their small size, they can cause significant health issues in infested fish, particularly in cases of heavy infestation, leading to impaired nutrient absorption and growth.