User blog comment:King Corsa/future of Rock Punchers/@comment-73.184.0.214-20160531150719/@comment-207.163.116.20-20160531190627

The Reefbacks, according to the concept art and several other sources such as the creature meeting document, have a possible future functionality of housing other fauna. In addition, they are currently the only roaming giant creature in the game. Rockpunchers have no current planned features and several other ground-walking fauna exist, such as the Sea Treader.