Minimal black marine life icons on white background

Four simple black line icons are arranged in a clean two-by-two grid on a white background. A jellyfish sits in the upper left, a scuba diver with bubbles appears in the upper right, coral fills the lower left, and a seashell anchors the lower right. The illustrations use thick, even outlines and plenty of empty space, giving the composition a crisp, modern graphic feel. With no shading or color beyond black on white, the set reads clearly as marine and underwater symbols suitable for design use, educational materials, or travel themes. The balanced layout and isolated objects make it easy to crop, scale, or place over other backgrounds. The mood is simple, clean, and iconographic rather than decorative.