The shimmering heart of the depths: A macro shot of a sea squirt (tunicate/Ascidiacea)—an organism that feeds by filtering water—standing out on a reef wall with its vivid red color.

In the photograph, a sea squirt (tunicate)—likely a solitary species resembling *Polycarpa* or *Styela*—is seen clinging to a reef wall, displaying vibrant, glowing red-orange hues. At the center of the organism, its characteristic siphons (openings)—through which it draws in water, filters it, and then expels it—are clearly visible, featuring a slightly fuzzy or textured appearance.