Classical morphometry has long been used as a standard method in the studies of
morphometric characteristics of organisms. However, in the last two decades of 21 century,
the application of geometric morphometry has increased rapidly because of advances in
quantitative biological shape analysis. Its development is accompanied by the development of
new technologies, primarily computer software. Geometric morphometry can be defined as a
fusion of geometry, biology and computer science, and enables the study of biological forms
in two-dimensional or three-dimensional space. Morphometric characters indicate the body
proportions as well as the proportions of individual body parts that are measured using certain
measurement units. The aim of this paper is to present geometric morphometry and explain its
application in ichthyological research, and point out its advantages and possibilities, in a
practical way.
