Despite its poor quality, the water of Dragon Lake was still drinkable after multiple filtrations, as it was, after all, a freshwater lake.
With the survivors constantly drawing water, the lake's water level was rapidly declining. Aquatic creatures gradually surfaced, making it easier for the survivors to catch them.
The various fish in the lake were certainly the first to be caught. Now that all superficial creatures had been taken, only the clams living in the mud remained in the lake.
Due to the high outdoor temperature, prolonged skin exposure could cause sunburns. Therefore, the survivors in the lake, like wild boars in the wilderness, had thick layers of mud on their bodies to prevent sunburn when clamming.
Since Dragon Lake hadn't been drained in a while, the clams in the lake's mud were quite large. Dong Tianyu observed for a while and noticed that the largest clam had a diameter of more than half a meter.