Fish stocks are distributed along oceans according to environmental conditions, salinity, ocean currents, food availability, seafloor characteristics, and other factors that influence their abundance and distribution. These marine variables are also involved in conditions affecting breeding grounds, spawning, growth, and migration routes. Fishing States should systematically examine the relationship between such conditions and the different stages of growth of stocks to improve their efforts and performance and to introduce administrative measures to ensure the conservation of these stocks. I pay great attention to that. It is therefore clear that hydrographic knowledge of the marine environment is a fundamental tool for both those undertaking the harvesting of fish stocks and those responsible for their proper and efficient management. Their goal is sustainable use and preservation. Hydrographic photography for fisheries is a whole field of ocean exploration that employs many technical tools with which hydrographers are fairly familiar and routinely used in hydrographic activities. Seabed surveys have therefore proven to be a real necessity for fishermen, especially when working in shallow waters and fishing for benthic resources (those associated with the seabed). Some species of commercial interest are found in association with specific seafloor features such as: Apart from that, they can also transmit other pathogens that can lead to severe loss of important fish species. The use of proper grids and filters can prevent coarse fish from entering. Preventing fish-eating birds from entering fish farms (particularly trout farms) helps prevent and limit the spread of fish diseases. Safety nets are used to keep birds out. The number of fish-eating birds is regulated in overcrowded areas. Prophylactic control of snails as intermediate hosts for some fish parasites is biological (inserted black carp - Myelopharyngodon piceus or 3-year-old tench Tinca tinca), mechanical, physical (soil drying and freezing), and may be chemical (application of molluscicide). Safe and harmless removal of dead fish is an important way to prevent further transmission of fish pathogens. Fresh or slightly rotten dead fish are decontaminated at your local veterinary facility. Small chunks of dead fish should be burned or buried in deep pits at least 20 m from the edge of the pond. The bottom of this pit and dead fish should be covered with quicklime or chlorinated lime. A layer of at least 60-80 cm of soil should cover the pit contents. Mountains or grooves. Complications in oil pipelines and subsea structures pose threats to fishing gear in some countries. can play an important role in the development of Through interesting and innovative partnerships between private consultants and Hydrographic Offices, some countries have decided to map the distribution of marine resources and species using the same standards and techniques required for nautical charts. A lot of effort is put into it. It is very important for fisheries to be able to rely on up-to-date information about the marine environment to determine favorable fishing conditions. This information may be in the form of sea surface temperature charts, heat, salinity, and other variables of the vertical structure of the water column. This information can be used to better focus their fishing efforts and even make predictions about potential fishing grounds. Remote sensing using sonar, hydroacoustic surveying, uses disposable butty thermographs (XBT), conductivity-temperature-depth sensor CTDs, and other methods commonly used in the hydrographic survey industry.