This vintage-style natural history tee features detailed black ink illustrations of iconic marine mammals—orca, dolphin, seal, sea lion, beluga whale, and walrus—set against a clean white background for a classic scientific plate look. Representing species that diversified during the Cenozoic Era, particularly the Neogene to Quaternary periods, the design has a subtle distressed, retro field-guide aesthetic that appeals to ocean lovers and science enthusiasts alike. Made from 100% ring-spun cotton (high-quality cotton) with a soft, sensory-friendly feel. Every shirt purchased plants a tree, and the material is eco-friendly.