Goldman said the workers and the pad, which collects bacteria created by fish urine and feces, like some household aquarium filters, fell to the bottom of the tank.

• 高德曼表示，这四名工人和过滤垫全都掉落槽底。这种过滤垫可收集鱼群排泄物所孳生的细菌，功能与部份家庭水族箱的过滤器相似。