Question about a type of Biology

Question

What is the study of Turtles called

What is the study of Sea Otters called

Please need to know

Answer 1

Herpetologists study reptiles (including turtles).

Marine Biologists study sea life (including sea turtles and sea otters).

Answer 2

Ecology is the study of plants, animals and their environment.  I don't believe there is a name specifically allocated for the study of turtles.  Oceanography is the study of marine organisms and marine biology studies the life forms found in the sea and could be used to cover the study of sea otters.