Icthyophthirius multifiliis from a swordtail tropical fish. This
specimen was alive at the time of the photo and stained with methylene blue.
The cytostome opens to the top. The cilia are apparent. 100x
Ichthyophthirius multifiliis trophozoite attached to a ctenoid fish scale
of a swordtail. In vivo, unstained. 100x
Ichthyophthirius multifiliis trophozoite from a swordtail. In vivo,
unstained. This frame reveals the opening to the cytostome to the far
right. The faint bands appearing obliquely are ciliary waves in the
metachronal stroke. 400x