First of all, I'm new here, just made this account because I had a question that google returned nothing back on, but it looks like this will be a pretty interesting place to learn outside of school
Onto my question:I know that, since we are the only planet on which we are certain life has evolved, this would be near impossible to provide a concrete answer on, but the theories are interesting to think about. I want to know if, on a planet mostly covered in water (even more so than our own planet) a sea-dwelling species could eventually evolve to a similar dominant position as humanity has done here on earth. Are there any known limitations on cognitive function or physiological development that would hinder this process? What would be some of the requirements for a sea-dwelling race of creatures to evolve a highly complex and multifaceted civilization like ours?