Capillaria spp

From Fish
The nematode Capillaria found in the intestine of a freshwater angelfish, 400X. Courtesy of Dr. Ruth Francis-Floyd

Capillaria spp are a common parasite of aquarium fish, particularly freshwater angelfish.

Heavy infections in juvenile angelfish have been associated with poor growth rates and an inability to withstand shipping and handling[1].

Treatment with fenbendazole (25 mg/kg for 3 days) is recommended, but efficacy has not been firmly established. Levamisole (10 mg/L) administered as a bath treatment for 3 days has also been recommended. Ivermectin is highly toxic to aquarium fish, particularly cichlids, and its use is not recommended.