branchiobdellids
... that most branchiobdellids use crayfish as hosts, living on their heads, carapaces, or claws, but in some instances inside their gill cavities?
... that most <b id="mwChA"><a href="./Branchiobdellida" id="mwChE" rel="mw:WikiLink" title="Branchiobdellida">branchiobdellids</a></b> use <a href="./Crayfish" id="mwChI" rel="mw:WikiLink" title="Crayfish">crayfish</a> as hosts, living on their heads, <a href="./Carapace" id="mwChM" rel="mw:WikiLink" title="Carapace">carapaces</a>, or <a href="./Chela_(organ)" id="mwChQ" rel="mw:WikiLink" title="Chela (organ)">claws</a>, but in some instances inside their gill cavities?