Unfortunately this is just the way Google works. It prioritizes links to images that have been linked to, and the ones you find in forums, articles and flickr are often linked to, primarily from within their own web framework (which Google rates highly), but also put more into context. To get your own images on your imagevue website higher in google, you would basically need external websites to link directly to an image, preferably with a text link (or contextual text surrounding it) "<a>This is a picture of an amazon swamp crocodile</a>". Google just doesnt rate a single image alone very highly ...
When it comes to image results, this will always be the case unfortunately, and its not easy to get separate images from a general gallery into Google. Easier if its a forum, article or blog with information about the image. For example, try searching "Bottlenose dolphin" in Google:
https://www.google.co.th/search?q=bottl ... =isch&sa=X
Now, if you click almost all those links, you will see the page that hosts the image is almost always a nature related blog or article related to the image. Your general "gallery" can't beat that ...
Having said that, SEO in Imagevue is not optimal, primarily because of the fragmentation between platforms and devices ... and also because its a plain gallery that "shows" images, and does not highlight a topic or article in general. A future version X3 should be optimal, but it will not revolutionize the way Google prioritizes images in search.