That colorized photo at the beginning of the thread is not a GATO class. It is a Balao class boat, EB design. You can tell by the chariot style fairwater and the dimple extension in the fairwater (right side fwd on the fairwater) where the conning tower hatch is (Gatos did not have that feature). The GATOs (which is what the other pictures are) has a higher bridge and by the end of the war most were cut down leaving vertical ribs showing, the so called 'covered wagon' effect. Cobia was one of the boats that did not receive that mod, however.
That 'colorized' boat in my opinion, is shown in a post WWII configuration. During 47-48, in an effort to streamline the boats in SubPac. on many the guns were removed and the fwd and after gun decks were trimmed back to remove the overhang. (some just fwd) in what was called a "Pearl Harbor" conversion. This left a rather bare looking fleet boat, which is consistent with the colorized photo.
Here is a link to a photo of MAPIRO on sea trials in Lake Michigan, a Manitowoc built "Balao" class boat, to compare to the first photo.
http://lh6.ggpht.com/_KZKtgQBJEn0/RuY520ag6JI/AAAAAAAAIf8/2jIDZvvIPlA/SUBMARINE%20USS%Here is another link to a Gato class (USS Rasher running on Lake Michigan) to illustrate the difference.
http://www.wisconsinmaritime.org/typo3temp/pics/aebd302953.jpgI'm not suggesting the colorized photo is of MAPIRO, it is just for comparison.