Working with animation in Adobe Photoshop

Creating an animation can be time consuming, however I feel that photoshop has made it  easier in a sense that you use layers most of the time.  For instance, when using other types of programs for 2D animation it seems to be more complicated.  Where as, with Photoshop I followed a few simple methods, additionally it was a bit easier to use this feature having worked with photoshop for a long while.  The animation of (dolphins) can be seen in the uploaded GIF file.

Perspective views ( illustration of an arrangement of objects )

From the image scan of the illustration of arranged objects, I created a bolder outline in Illustrator. I duplicated and  arranged the objects and placed them in which they could appear to be behind or in front of each other. Additionally, I resized the objects to create an effect of distance between the objects i.e near or far. In contrast to this, I added a few colored circles of different shades to the Illustration (an arrangement of objects) to experiment with how this could create distance.