Answer
d) The term Ethology was coined by the French aoologist, Geoffroy Saint-Hilaire. It is the study of animal behavior with emphasis on behavioral patterns that occur in natural environments. This is one area where marine aquarists can contribute observations on behavior of fish and invertebrates, particularly in reef tanks where the captive environment is somewhat similar to the natural environment. The behavior of many animals relatively common in the reef tanks may not be well known to science.