On Monday the 'rents and I went down to the ocean, and low tide makes for lots of fun for Suni! Lots of tide pools in which to play and find interesting things! Like this starfish. I'm assuming the little red dot is some kind of sense organ, both of the starfish I found had one. Here's the close up!
Watching it work on turning itself over was amazing. All those little feet flailing around!
Feet in action (right click, save target as please!)
Update: The little dot isn't a sense organ, it's part of the vascular/water system that starfish use to move! Thanks to my dad for hunting down the answer.