Haven't seen the eel before but quite a few soapfish similar to what is in the photo. Haven't heard of Panther Groupers before though. Tons of exotics have been introduced all over the place worldwide for a long time. Some don't make it, some cope while still others take over. It sounds like the lionfish may be well entrenched already.
Was just talking to someone over on North Andros, he said they had lionfish, enough to make it the national Bahamian fish. Noticed the image below on a site from the Exuma's. I haven't seen anything in the literature yet that indicates the invasion is as widespread as this. Looks like the lionfish may be here to stay at this point, warts and all. Have difficulty believing all this came from six fish that might have survived a 15 ft. plus storm surge that bashed through a house in Miami 15 years ago.
From:
Bahamas Diving - Custom Dive Charters in Exuma and Nassau Bahamas