sony a580 and bluish tint

I know everyone is on to the newer cameras but I bot the 580 as a back up to my a700 since I started to have wheel travel.

I notice that sometimes the images have a more bluish cast. particularly the alligator from the 580 at this link. all shot in jpeg.

I have enclosed a link since don't know how to put on this website

I took some pics of alligators at alligator farm in st. augustine, fl with a700 and some with a580. the edited one with the a580 has a bluish tone no matter how I edit it. I picked out some others taken with the a700 that are not great shots but have a very slightly bluish tint as well , nothing like the 580 pic however. they were taken at different locations and different times of day which makes a comparison hard.

Any ideas as to why the differences or bluish tint? - water, light etc. etc?. 580 is set at sharpness + 1 and saturation -1 contrast -1. a700 set at sharpness +1, and sat and contrast at 0. both at standard.

https://picasaweb.google.com/103208386303537003385/Blue#

thanks