Complex sentence: Ultimately, the incident initiated a national discussion on invasive species and comparisons with the mute swan, also an invasive and destructive species of the Chesapeake Bay watershed but, in comparison, quite beautiful, and which garnered support from some environmental and animal rights groups.
Split into simpler sentences: Ultimately, the incident initiated a national discussion on invasive species. One comparison case was the mute swan, also an invasive and destructive species of the Chesapeake Bay watershed but, in comparison, quite beautiful, and which garnered support from some environmental and animal rights groups.