For better management of marine gastropods in the Ivorian Exclusive Economic Zone (ZEE), an inventory of the species landed in Abidjan has been carried out. Sampling was done on catches from industrial and artisanal fisheries. Three sites located in Abidjan respectively at the fishing port, in Zimbabwe and in Abobo Doumé were visited during the period from January 2016 to January 2018. At the end of this study, 2622 individuals were collected. Species identification was based on the identification method proposed by Gaillard (1987), Fischer et al (1981), and Marche-Marchad (1975). The taxonomic names (scientific, French and English) were verified using the World Taxonomy Register of Marine Species called "World Register Marine Species". A total of eleven species divided into seven families (Cassidae, Melongenidae, Muricidae, Naticidae, Ranellidae, Tonnidae and Volutidae) have been identified. The volutidae family includes three landed species: Cymbium glans, Cymbium souliei and Cymbium tritoni. In this family, the species Cymbium glans and Cymbium souliei were the most frequent (frequency of occurrence greater than 50%). This family plays an important role in the trade of marine gastropods of the Ivorian fishery.

Study of the diet and feeding habits of 104 specimens of Liza dumerili (Steindachner, 1870) and 113 specimens of Liza falcipinnis (Valenciennes, 1836) coming from the artisanal fishing of the Grand-Lahou lagoon was carried out over the period from September 2008 to August 2009. Analysis of stomach contents revealed that these two species of fish feed mainly on diatoms and detritus. It appears that these species are phytoplanktonophagous and detritivores. The diet of Liza falcipinnis does not vary according to the size of the individuals. These two species specialize in the consumption of diatoms, particularly pennate diatoms.