"A Town of Roots" 

God knows where the mermaid got this steel algae, but it should be when they were on the way to this place because this lake did have many floating algae. 

It was just that, the group didn't dare to touch anything, afraid that they would court death instead. 

The mermaid was not a native of this lake, but she was indeed more knowledgeable about water creatures, so the woman immediately used the algae to tie everyone's wrist together. 

Of course, to give some personal space to each person, the algae could be stretched to several meters but after that, they could not go too far. 

It was not that the mermaid was paranoid or overreacting, but it was never a good choice to separate the group when they went to the dangerous area, especially when they were all underwater. 

The contestants were all protected by the gentle glasses man's barrier-like body armor, but it didn't mean the group could separate, even if they went with another person.