This work was carried out with the aim of analyzing the growth parameters of Hepsetus odoe (Bloch, 1794) caught in the Ebrié lagoon with a view to contributing to the conservation and sustainable management of this fish. A total of 220 fish from commercial artisanal fishing were sampled from July 2022 to June 2023 in sector IV of the Ebrié lagoon. Each specimen was weighed and measured to the nearest gram and millimeter respectively. The length-weight relationship and the condition factor were calculated. The data collected were processed on Excel and Statistica 7.1 software. The size of the individuals varies from 11.2 to 36 cm and the weight oscillates between 10.2 and 196 g. The size frequency distribution is unimodal ([17; 20 [cm). In general, growth is of the positive allometry type regardless of sex and size. It appears that the species is gaining weight faster than it is growing. In males and females the mean value of the condition factor K is 0.638 ± 0.02 and 0.700 ± 0.014 respectively. These individuals are not overweight in their biotope regardless of their sex and size.
The diet of Cymbium glans, was studied from January 2016 to January 2018. This study was made from the stomach collected monthly on the gastropod from the industrial and artisanal marine fisheries of the EEZ. All the stomach contained prey. The vacancy coefficient (Cv) is zero. The methods of corrected occurrence frequency, numerical frequency and specific abundance were used to analyze the importance of different prey. The analyzes indicate that the Cymbium glans feeds on phytoplankton mainly diatoms (38, 2%). Zooplankton (crustacean) occupies 4%. The proportion of zooplankton increases with the size of the individual. In addition, the diet does not change, according to the marine seasons, nor according to the size of the individuals landed.