Are we as many ancient cultures (Egyptian, chinese,etc) have indicated decendants of a race of aquatic beings?
Sometimes, with spiritual wisdoms messages {MEANINGS} are more important that dry and exact words or symbols. For instance, a Meshiach or annointed one (“Jesus”) forwarned about two big “fish” or followings that were supposed to arrive in this Egyptian year (80 BCE – 2080 AD). Also, if you read revelations 17:15, you’ll see that waters in that case referred to… but Anywho, to answer your question, since all else took the evolutionary route i’ll go with it and say YES, we do descend from aquatic creatures. Hydra might have been the first creatures to see: http://www.sciencecodex.