More than 700 kilograms of dead fish have been pulled out of a Brisbane waterway, prompting a Brisbane City Council investigation.

Hundreds of fish have been discovered floating dead in the lake at Forest Lake over the past few weeks, creating a smelly environment described as “disgusting”.

More than 700 kilograms of dead fish have been removed from the lake at Forest Lake. Credit:Pest Fishing Adventures

Pest Fishing Adventures co-founder Nicole Whysall said she went to the lake on Sunday and found hundreds of dead fish.

“It was disgusting,” Miss Whysall said.