I’m running late putting this one up, but here it is now!
I found this image of a seahorse from a 1920 magazine for teachers, about teaching art to children of various ages in school. I think the page it was on (which featured 3 fish and the seahorse) was meant as an educational coloring page for younger children. In any case, I thought he was delightful, and edited him into a digital stamp.
I hope you enjoy using him as much as I did making him!