I really do wonder how humans would've adapted had we been aquatic animals. Energy usage via fire is not possible, and it seems other energy usage under water i

I really do wonder how humans would've adapted had we been aquatic animals. Energy usage via fire is not possible, and it seems other energy usage under water is much harder than simply creating fire, so we could still have the same level of intelligence as now, yet be so far behind technologically than we are now.