This research aimed to study the determinants of marine environment development in the Red Sea. Field data were collected Using a personal interview questionnaire during September and October 2021, for a simple random sample of 56 respondents, representing 80% of the total of 70 respondents, and Cronbach's Alpha coefficient was used to test reliability of measures, while frequencies, percentages, average, standard deviation, median, and average weight were used to analysis data and present the results. The most important results of study were:
Total determinants had a medium effect on the development of the marine environment in the Red Sea with a percentage of 53.6%, according to the respondents' opinions, and that the determinants of wrong fishing practices were the first order between the total determinants at a relative weight of 0.92 degrees,whereas the determinants of extension services, fishermen's community, fishery studies and statistics, and fishery laws and legislation were the second, third, fourth and fifth order with a relative weight of 0.87, 0.86, 0.73, and 0.71 degrees respectively, in the sixth and last order the determinants of pollution came between the total determinants with a relative weight of 0.59 degrees.
The suggestion to awareness of  fishermen about the importance of being committed during the period of stop fishing occupied 76.8%, activating the role of fishery extension for fishermen (62.6%), the implementing and activating fishing laws (58.9%), and the implementing and activating laws to tighten control over fry traders (50.0%), and awareness of fishermen about the risks overfishing and contradicted fishing (48.2%). the Most respondents' suggestions to confront the determinants of development of the marine environment in the Red Sea.