Are there dangerous animals in the Brisbane River?

Fish known to frequent the Brisbane River include:

• Bream (everywhere)
• Flathead (lower reaches)
• Snapper (lower reaches)
• Threadfin Salmon (near the Gateway bridge and the mouth of the river)
• Mangrove jacks (near the mouth)
• Catfish (anywhere)
• Bass (upper reaches)
• Yellowbelly/Golden Perch (upper reaches)