You can still build edged tools, weapons, clocks, and computers at the bottom of a gravity well. Being aquatic is completely different -- the environment often

You can still build edged tools, weapons, clocks, and computers at the bottom of a gravity well. Being aquatic is completely different -- the environment often keeps you from evolving manipulators for building tools. Even if you evolve the manipulators, the environment automatically degrades the value of the tools.