A paleontologist would generally study paleontology.
An environmental veterinarian would study this particular example. Veterinarians study animals, and environmental vets study the effects a particular environment has on them.
Ornithologist.
A geologist studies rocks and what the earth is made of. A petrologist is someone who looks at rocks directly.
Myrmecologists studt ants!
Cetology is the branch of marine science associated with the study of cetaceans, which is the order that contains whales, dolphins, and porpoises. Logically, a scientist who studies whales is therefore a cetologist.
Volcanologist.
A Botanist
A paleontologist would generally study paleontology.
The type of investigation would be fieldwork.
meteorologist
a marine vulcanologist
geologists
a physicist
Geologist - specifically a 'Vulcanologist'
biologist means who study about life and a scientist who study about every thing
zoologists