Oceanography is the scientific branch which has to do with the biological and physicals of the sea and its phenomena.
Regular Blogs
Written by a man who explores how changes in the ocean affect people and wildlife, this blog shares his observations as well as his commentary about the social and ethical implications on humankind.
http://carlsafina.org/blog/
Shares updated news and discussions on the topic of ocean acidification. This web log began in 2006 with one person maintaining it and is now sponsored by the European Project on Ocean Acidification.
http://oceanacidification.wordpress.com/
Chronicles the 2010 cruise which is where oceanographers conducted experiments and gathered research in seismic activity.
http://lifeonshatsky.blogspot.com/
This is the official blog of the Monterey Bay Aquarium, and it presents articles about marine mammals, sustainable seafood, and the great white shark.
http://montereybayaquarium.typepad.com/sea_notes/