Firstly, koalas are not bears.
There is no particular name for someone who studies koalas.
People who study the field of animal Biology are zoologists. While there are specialised areas within this broad parameter (such as ornithologists, who study birds), there is no particular name for one who studies koalas. It is too narrow a field.
zoologist is a term that can be used to describe a scientist who studies any kind of animal, from tigers to insects. Another term that is widely used is wildlife biologist, which is equally broad. A more specific term that can be used to describe a scientist that studies tigers is Mammalogist, which is a wildlife biologist or zoologist who specializes in the study of mammals.
I've heard that bear scientist people are called Ursanologists.
maybe a zoooligist cus thast what its called when you study animals it think
A zooligist is someone that studies animals. This would include pandas
A scientist that studies bears would be called an ursinologist.
Gemologists
you call it chemist i think
A magnetometer is a device used to measure the intensity and direction of a magnetic field.
robot
A scientist that studies bears would be called an ursinologist.
Zoologist
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.