Oecologia《生态学》（月刊）. Oecologia publishes innovative ecological research of general interest to a broad international audience. We publish several types of manuscripts in many areas of ecology.

Odonatologica《蜻蜓学》（季刊）. Journal published for the International Odonatological Foundation, Societas Internationalis Odonatologica (S.I.O.). Odonatologica publishes original papers in all fields of odonatology. It is a semi-annual journal, published on 1st June and 1st December. It is general policy that submitted papers will be refereed. Publication language is English.

Ocular Immunology and Inflammation《眼部免疫与炎症》（一年8期）. Ocular Immunology & Inflammation ranks 18 out of 59 in the Ophthalmology Category.Ocular Immunology and Inflammation is a peer-reviewed, scientific publication that welcomes the submission of original, previously unpublished manuscripts directed to ophthalmologists and vision scientists. Published bimonthly, the journal provides an international medium for basic and clinical research reports on the ocular inflammatory response and its control by the immune system. The journal publishes original research papers, case reports, reviews, letters to the editor, meeting abstracts, and invited editorials.

Oceanology《海洋学》（双月刊）. Oceanology is an international peer-reviewed journal. Founded in 1961, Oceanology is the leading journal in all areas of the marine sciences. It publishes original papers in all fields of theoretical and experimental research in physical, chemical, biological, geological, and technical oceanology and information about cruises and events of interest to the oceanographic community. The journal welcomes manuscripts from all countries.

Oceanological and Hydrobiological Studies《海洋学与水生物学研究》（季刊）. Oceanological and Hydrobiological Studies is an international journal owned by the University of Gdańsk in Poland. The journal has 4 issues per year and contains papers on all aspects of the marine environment and hydrobiology. All manuscripts are reviewed by editors and independent experts. Based on the referees recommendations, the Editor will make a decision on whether to accept a contribution. All articles are published in English. The journal is open to all matters concerning the water environment, thus providing the readers with a wide spectrum of topics in every issue.

Oceanologia《海洋学》（季刊）. Oceanologia, the official journal of the Committee of Marine Research and the Institute of Oceanology of the Polish Academy of Sciences, is an international journal that publishes results of original research in the field of marine sciences with emphasis on the European seas. Manuscripts contributing, but not limited, to the understanding of properties and processes in the marine environment in the aspect of basic sciences: biology, chemistry, physics, ecology and geochemistry will be considered for publication.

Oceanography《海洋学》（季刊）. Oceanography is an open-access journal that publishes peer-reviewed articles that chronicle all aspects of ocean science and its applications. The journal presents significant research, noteworthy achievements, exciting new technology, and articles that address public policy and education and how they are affected by science and technology. The overall goal of Oceanography is cross-disciplinary communication in the ocean sciences.

Ocean Science Journal《海洋科学杂志》（季刊）. Ocean Science Journal is a scientific journal published quarterly (30th March, June, September, December) by the Korean Society of Oceanography (KSO) and Korea Institute of Ocean Science & Technology (KIOST). OSJ is international and interdisciplinary. Research articles, reviews and notes dealing with physical oceanography, biological oceanography/marine biology, chemical oceanography/marine chemistry, geological oceanography/marine geology, and marine pollution will be considered.

Ocean Science《海洋科学》（双月刊）. Ocean Science (OS) is a not-for-profit international open-access scientific journal dedicated to the publication and discussion of research articles, short communications, and review papers on all aspects of ocean science: experimental, theoretical, and laboratory. The primary objective is to publish a very high-quality scientific journal with free Internet-based access for researchers and other interested people throughout the world.

Ocean Modelling《海洋模拟》（双月刊）. The main objective of Ocean Modelling is to provide rapid communication between those interested in ocean modelling, whether through direct observation, or through analytical, numerical or laboratory models, and including interactions between physical and biogeochemical or biological phenomena. Because of the intimate links between ocean and atmosphere, involvement of scientists interested in influences of either medium on the other is welcome. The journal has a wide scope and includes ocean-atmosphere interaction in various forms as well as pure ocean results. In addition to primary peer-reviewed papers, the journal provides review papers, preliminary communications, and discussions.