Vertebrates-- Cold-blooded vertebrates-- Pisces (Fishes)-- Cat fishes 154 History 25 Fossil fishes, Pisces, cold-blooded vertebrates 18 Generalities--General Knowledge--Quiz--KPSC exam--Malayalam books--Psc exams--KPSC short cuts 15 Philosophy 15 Pisces 13 English drama 12 History and criticism 12 Mathematics 12 Sea level rise 12 General knowledge 11 Literature 11 French fiction 10 PSC 10 Psychology 10 English literature 9 Generalities--General Knowledge--Quiz--PSC exam--Malayalam books 9 Methodology 9 Pisces (Ichthyology)-- Fishes-- Zoology 9 Plant Biotechnology 9 Criticism and interpretation 8 Drama 8 Economics 8 Oceanography 8 Research 8 Botany 7 Chemistry 7 Engineering 7 English poetry 7 Genetics 7