The encyclopaedia contains terms covering: marine biology, limnology, ecology, pathology, oceanography, meteorology, aquaculture, fishing gear and gear materials, fishing methods, fish processing and products, processing machines, microbiology. Only those terms which are frequently used, or which are though to be helpful to different kinds of users are included. It is an encyclopaedia of fish and fisheries, written by specialists, partly for other specialists but more particularly for laymen, and for students and interested workers.