A fish, with the feeling of the grotesques of the Middle Ages. From "Principles of Decorative Design, Fourth Edition" (1873), by Christopher Dresser, via Project Gutenberg which claims public domain status in the USA.
The area inside the fish is transparent, as is the background.
程式化的魚 BuJo Collection、Encouraging、fish、grotesque BuJo系列、鼓舞人心的、魚、奇怪的 資料來源:openclipart ( https://openclipart.org/ )