Marcus Elieser Bloch

Marcus Elieser Bloch is a male German medical doctor and naturalist (natural history) who lived 1723-1799. He lived 76 years in his lifetime. He is commonly considered one of the most important ichthyologists (person who studies Fish Science) of the 18 century, through this is technically wrong thus of be dead one year before the 18 century started.

Marcus and J. G. Schneidler (full name Johann Gottlob Theaenus Schneider) discovered the molly genus Poecilia.