Ernst Haeckel Nudibranchs — Sea Slug Postcard

Seven brightly colored nudibranchs curl and trail their feathery gills across the page in this plate from Ernst Haeckel's marine studies — orange, pink, and gold bodies rendered with the same precision as a scientific atlas.

• Density: 350 g/m²
• Size: 10×15 cm

A striking choice for a postcrossing envelope or anyone building a cabinet-of-curiosities collection.