Atlanta lesueurii
... that the 6 mm sea snail Atlanta lesueurii achieves vertical migration of several tens of meters each day?
... that the 6 mm <a href="./Sea_snail" id="mwBKM" rel="mw:WikiLink" title="Sea snail">sea snail</a> <i id="mwBKQ"><b id="mwBKU"><a href="./Atlanta_lesueurii" id="mwBKY" rel="mw:WikiLink" title="Atlanta lesueurii">Atlanta lesueurii</a></b></i> achieves <a class="mw-redirect" href="./Vertical_migration" id="mwBKc" rel="mw:WikiLink" title="Vertical migration">vertical migration</a> of several tens of meters each day?