Anhinga fish under water and often bring their catch to the surface and eat while they are swimming, flipping the fish around and swallowing it head first. This fellow may have tried that before climbing onto the alligator ramp.
He was having trouble dislodging the fish from his beak.
The ramp seemed like a convenient tool to work the fish free.
Or so he thought.
I missed the resolution this time. More than once I’ve seen the fish drop over the side after all that hard work.