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Great photo, - thanks! - This recent immigrant to Galapagos reminds us that there are two reasons why Galapagos ecosystems are special: One reason is the geographical isolation; Galapagos is 1000 km away from the continent. The second reason is that species who could cross that barrier don't find a suitable habitat where they could survive and settle. Probably cattle egrets made it to Galapagos, maybe often, before the middle of last century, - but they could successfully immigrant as a species only once humans had set up a suitable "home" for them: cattle pastures.
Great shots, Kathleen! I do believe, though, that these are Galapagos Sea Lions. Fur Seals are more stocky. Check out photos on http://www.darwinfoundation.org/datazone... or elsewhere on the web. Also, it is unlikely you saw Fur Seals on Santa Cruz...
Great spotting, great video! Thanks! A bit of additional info: Surface water temperatures in Galapagos are much lower than you would expect them to be on the equator, but they are generally around 20°C in the center of ther Archipelago, but may be around 15°C in Punta Espinoza, where sea productivity, i.e. growth of algae, is highest, - meaning that Marine Iguanas find most food where the water is coldest. That is why you see so many Marine Iguanas on Fernandina. And, yes, you are right, after feeding at low tide they really want to get out and warm up on the warm lava rocks! and they may stay out feeding for an hour and more, diving as deep as 10-15 meters for up to an hour!