That's not coral. It's HANDS AND FINGERS!
This was made with a mixture of photoshop and aftereffects. I used a photo of fingers and the "puppet tool" to animate them. I am considering videotaping hands as well and editing them in to add more variety to the types of movement. Also, I think the hands are becoming a bit too indistinct. Adding more hands to the foreground might make recognition easier while still being subtle. Changes to color may be needed to add more contrast. If I have time, I may make the "eyefish" (fish designed from human eyes) as well.