Here's a trio of gillcrackers (BRES) from our ponds:
![](http://i1067.photobucket.com/albums/u434/sprkplugphoto/TrioofGillCrackers_zpsa2113452.jpg)
Notice the lack of blue spotting on the body, and the missing red border around the larger, opercular tab.
Green Sunfish, showing the blue spots, and the smaller tab bordered with red.
![](http://i1067.photobucket.com/albums/u434/sprkplugphoto/images_zpsacf0623e.jpg)
So many variations......