Stiliger Nudibranch Displaying Blue and Yellow Pattern on Algae Blade in Bali

A high-magnification macro underwater photograph captures a vivid Stiliger species sea slug (commonly referred to as a blue-spotted or tiger-striped sacoglossan, Stiliger sp. / Placida sp.) perching on the edge of a green algal blade in Bali. The minute mollusk features a electric yellow body densely covered with striking, brilliant blue cerata and dark ringed spots. Situated on a fine strand of turf algae trailing off a green leaf frond, the colorful sea slug stands out vividly against the dark volcanic sand and rock substrate. Below the algal blade, a delicate, translucent commensal skeleton shrimp (caprellid amphipod) is subtly visible in the soft-focus background. The shallow depth of field keeps the intricate ceratal patterning and electric coloration in sharp focus. Ideal for sacoglossan research, nudibranch identification guides, marine biology textbooks, and professional nature stock media.