Leptocleidus
...that unlike most plesiosaurs, Leptocleidus once lived in shallow lagoon environments and likely visited brackish and fresh water systems such as the mouths of rivers?
...that unlike most <a class="mw-redirect" href="./Plesiosaurs" id="mwDU8" rel="mw:WikiLink" title="Plesiosaurs">plesiosaurs</a>, <i id="mwDVA"><b id="mwDVE"><a href="./Leptocleidus" id="mwDVI" rel="mw:WikiLink" title="Leptocleidus">Leptocleidus</a></b></i> once lived in shallow <a href="./Lagoon" id="mwDVM" rel="mw:WikiLink" title="Lagoon">lagoon</a> environments and likely visited <a class="mw-redirect" href="./Brackish" id="mwDVQ" rel="mw:WikiLink" title="Brackish">brackish</a> and <a href="./Fresh_water" id="mwDVU" rel="mw:WikiLink" title="Fresh water">fresh water</a> systems such as the mouths of <a class="mw-redirect" href="./Rivers" id="mwDVY" rel="mw:WikiLink" title="Rivers">rivers</a>?