Pufferfish Illustration: Inflated vs. Deflated Anatomy in Classic Engraving #1375167 (License: Personal Use)

This historical scientific illustration depicts two states of a pufferfish (Tetraodontidae family): the upper fish is in its normal, streamlined form, while the lower is fully inflated with sharp, erect spines-a key anti-predator adaptation. Fine linework captures scale texture, fin structure, and eye detail, reflecting pre-photographic marine zoological documentation methods. The image likely originates from a 19th-century natural history publication.

Used in educational content about marine biology, ichthyology, or evolutionary adaptations; ideal for museum websites, science blogs, or textbook supplements where visual comparison of animal defense mechanisms is needed.