Marine ecology-- Ocean ecology-- Sea ecology 117 Marine biology-- Biological oceanography, Marine Science 115 Marine ecology 71 Oceanography 54 Marine pollution 50 Marine biology 39 Literature 37 Marine fishes 31 Marine pollution-- Pollution in Ocean 31 Novel 27 Ecology 26 Fisheries 26 Fishes 26 Hindi literature 26 Marine phytoplankton 26 Zooplanktons-- marine invertebrates, marine zooplankton 26 English fiction 24 Literature Hindi 24 History 23 Dictionaries 20 Fishery management 19 Marine animals 19 Heridity 18 Marine mammals 18 Marine resources 18 Marine animals-- Marine zoology 17 Climatic changes 15 Dissertations, Academic (Ph.D) 15 Hindi 15 Marine sediments 15