There is a WFS service available, too, which allows you to access the underlying data that you see in the WMS response. You can browse all of these here in the Geoserver interface: https://maps.huntscore.com/geoserver/web/?wicket:bookmarkablePage=:org.geoserver.web.demo.MapPreviewPage

Then you can make a request just for the feature you want, which is well covered by this question's answers: http://gis.stackexchange.com/questions/110399/geoserver-wfs-can-i-pass-in-filter-parameters-via-the-url

You will need to apply your own styling once you have the features you are after.