After hearing Zhang Zian's explanation, everybody finally understood how the bobbit worm ended up there.
Electrician Wu blamed Welder Zhao repeatedly, complaining that he was too fixated on saving money. It would not have happened if he had bought a commercial eco-bio-block from an aquarium… Now that his beloved little grandson was almost bitten, what would he do?
In fact, everybody knew that even if Electrician Wu's grandson did stick his arm into the tank to grab the clam worm, he might not have been bitten by the bobbit worm. The bobbit worm was not stupid. A kid's arm was much thicker than a clam worm and was not on its menu for now. But since Electrician Wu was venting in rage, nobody said anything to make things worse.
It was Welder Zhao's mistake, so he had to suck it up.
To make amends, he grabbed a bottle of disinfectant immediately from the kitchen, wanting to pour it into the tank to kill the bobbit worm.