Moon Fairy
Molecular Chef
They are called dragonologists, which are a type of cryptozoologist.
An entomologist studies insects and spiders. An arachnologist studies spiders specifically.
A herpetologist works with reptiles and amphibians. This includes snakes, lizards and frogs.
As far as I can tell, in googling your question, I can only find "Sloth Researcher". Patient!!! And being nocturnal doesn't hurt.
You call someone that studies metal a metallurgist.
A physicist.
a person who studies planets is a planetologist.
There is no special name for someone who studies Hebrew.
An Anthropologist.
malacologist
euclidist
Gemologists
psychologist
A numismatist.
A Zoologist
a meteorologist.