Thamnostylus Dinema (1879) by Ernst Haeckel, from Monographie der Medusen.

Source: Ernst Mayer Library / Biodiversity Heritage Library

https://pdimagearchive.org/images/112f7311-b232-435b-ad41-6d1b8336512f

#zoology #jellyfish #marine #sea #medusae #art #publicdomain