umbrella slug
... that the presence of the umbrella slug in the Bay of Biscay, first reported in 2016, may be an example of "tropicalisation"?
... that the presence of the <b id="mwB_c"><a class="mw-redirect" href="./Umbrella_slug" id="mwB_g" rel="mw:WikiLink" title="Umbrella slug">umbrella slug</a></b> in the <a href="./Bay_of_Biscay" id="mwB_k" rel="mw:WikiLink" title="Bay of Biscay">Bay of Biscay</a>, first reported in 2016, may be an example of "tropicalisation"?