envirologist
The name of a scientist that studies sports is called a sports scientist.
A virologist is a scientist who studies viruses.
An arachnologist
A scientist who studies animals is called a zoologist.
A scientist who studies radioactivity is called a nuclear physicist or a radiologist.
A scientist who studies animal life is a zoologist. There is no particular name for a scientist that specialises in platypuses.
A person who studies chips is typically referred to as a food scientist or a food technologist, specializing in the field of snack food production and development.
The name for this type of scientist is a teuthologist
This answer is a entomologistA scientist who only studies fish is called an ichthyologist.
Parasitologist
Entomologist
environmentalist