Japanese eelgrass
... that Japanese eelgrass is believed to have travelled to North America in the company of oysters?
... that <b id="mwCZo"><a href="./Zostera_japonica" id="mwCZs" rel="mw:WikiLink" title="Zostera japonica">Japanese eelgrass</a></b> is believed to have travelled to North America in the company of <a href="./Pacific_oyster" id="mwCZw" rel="mw:WikiLink" title="Pacific oyster">oysters</a>?