Humans

The group of ten people stared at the new Island that came out of the Great Wall with excitement. To them, this was a lump of new meat, running toward the pack of wolves!

The people stood on a single 100-meter Island and they watched the silhouette of an Island come closer. And when it was about 50 meters away from them, it stopped, and then a smaller Island came forth.

The knowledge of Isles surrounding major Islands wasn't known to those people. 

Red Base was the first community of Islands, it's safe to assume there were many major Islands that the small Islands.

If anything, this told them that the person coming to them was at the very least Grade 3 level 2. Which was nothing for them as each one of them was Grade 3.

The newcomer crossed the distance and by the time he was 10 meters away from them, the ten people all smirked.