starfish shrimps
... that up to fifty starfish shrimps have been found living on a single host?
... that up to fifty <b id="mwAgo"><a href="./Zenopontonia_soror" id="mwAgs" rel="mw:WikiLink" title="Zenopontonia soror">starfish shrimps</a></b> have been found living on a single <a href="./Host_(biology)" id="mwAgw" rel="mw:WikiLink" title="Host (biology)">host</a>?