I live in south Florida and we are packed filled with exotics. Personally I don’t think any effect our ecosystem just add to the beauty of it.
Even the snakehead which are EVERYWHERE in palm beach county. Are an amazing game fish to catch. Specially on topwater. I see snakehead living with largemouth, peacocks, snook, tarpon, many cichlids. All the populations se strong We also have a decent clown knife population in the lake ida chain. Which is AWESOME fishing