Good thread. The fact yo umention about uniqueness of ocean life in different parts is very interesting. Land life can be different cause all the major peices of lands are not connected. But all the oceans are connected. Even then we find such separtions.
Have you seen "Blue Planet". Its a Discovery Channel Documentary on a 4 DVD set. Worth watching on a good home theatre system and plasma type TV
P.S. Are you surprised now? YEah, I did not answer your questions.