

A coral reef drawn in black ink on white, with branching sea fans rising behind a square slab and smooth rocks and sand ridges along the seabed. Three square frames, each holding a black sun-like disc with radiating lines, disguise the finder squares. The data modules are rounded, melting black blobs and dots that look like coral growth or ink pools. Strong black against clean white and sparse grey shading keeps the pattern easy to read, while thin sea fan branches stay clear of the code area.