Hippocampinae
... that in some classification systems, the subfamily Hippocampinae includes several genera of pygmy pipehorses, which look like seahorses but do not swim upright?
... that in some classification systems, the subfamily <b id="mwB1g"><a href="./Hippocampinae" id="mwB1k" rel="mw:WikiLink" title="Hippocampinae">Hippocampinae</a></b> includes several <a class="mw-redirect" href="./Genera_(biology)" id="mwB1o" rel="mw:WikiLink" title="Genera (biology)">genera</a> of pygmy pipehorses, which look like <a href="./Seahorse" id="mwB1s" rel="mw:WikiLink" title="Seahorse">seahorses</a> but do not swim upright?