COATS, D. WAYNE
Journal of Eukaryotic Microbiology, Volume 46, Issue 4, July 1999, Pages 402–409
[…]parasitic dinoflagellates exhibit vary- ing degrees of host specificity. The fish ectoparasite Amyloodinium ocellatum shows almost no host preference, with infections reported for over 100 species representing more than 40 families of fish (Lom 1981). Amyloodinium ocellatum has even been reported as a hyperparasite of a trematode parasite on the skin of [fish].
Somewhat less than half of the dinoflagellate genera infecting marine organisms are ectoparasites that use specialized holdfast organelles and/or modified peduncles for attaching to their host and obtaining nourishment[…].
[There are] species known to attack the following organisms: (1) marine protists, including diatoms[…]; (2) eggs of rotifers, cope- pods, euphausids, shrimp, and fish[…]; ( 3 ) adult and/or juvenile hydromedusae, siphonophores, ctenophores, annelids, chaetognaths, appendicularia, and fish (by Amyloodinium ocellatum[…]); and (4) the parasitic trematode Neobenedenia melleni (by Amyloodinium ocellatum); see references for Table 1.