sea fan
...that a sea fan is a form of sessile colonial cnidarian, similar to a sea pen or a soft coral, found in tropical and subtropical seawater?
...that a <b id="mwAbU"><a class="mw-redirect" href="./Sea_fan" id="mwAbY" rel="mw:WikiLink" title="Sea fan">sea fan</a></b> is a form of <a class="mw-redirect mw-disambig" href="./Sessile" id="mwAbc" rel="mw:WikiLink" title="Sessile">sessile</a> <a href="./Colony" id="mwAbg" rel="mw:WikiLink" title="Colony">colonial</a> <a href="./Cnidaria" id="mwAbk" rel="mw:WikiLink" title="Cnidaria">cnidarian</a>, similar to a <a href="./Sea_pen" id="mwAbo" rel="mw:WikiLink" title="Sea pen">sea pen</a> or a soft <a href="./Coral" id="mwAbs" rel="mw:WikiLink" title="Coral">coral</a>, found in <a class="mw-redirect" href="./Tropical" id="mwAbw" rel="mw:WikiLink" title="Tropical">tropical</a> and <a class="mw-redirect" href="./Subtropical" id="mwAb0" rel="mw:WikiLink" title="Subtropical">subtropical</a> seawater?