It sounds silly but also a lack of ability to make fire puts a dampener on things. No easily digestible cooked food. No ability to make metals. Perhaps somew

It sounds silly but also a lack of ability to make fire puts a dampener on things. No easily digestible cooked food. No ability to make metals. Perhaps somewhere near an underwater volcano there is a technologically advanced octopus city waiting to be found? Like Octlantis, but hotter, and with steel (“Cuttlefisheffield“?): https://www.theguardian.com/environment/shortcuts/2017/sep/18/octlantis-the-underwater-city-built-by-octopuses https://www.theguardian.com/environment/shortcuts/2017/sep/1...