Introduction: The specific physiological capacity of marine organisms, including seaweeds, to survive in extreme environmental conditions is associated to the production of secondary metabolites. Seaweeds are known as powerful source of a broad range of bioactive compounds. Objective: The aim of this study was to investigate the phytocompounds and chemical elements present in eight species of seaweeds which occur around Inhaca Island, Mozambique. Specifically, Halimeda cuneata, Pseudorhizoclonium africanum, Pseudocodium devriesii, Dictyota suhrii, Gracilaria salicornia, Hypnea rosea, Laurencia natalensis and Jania adhaerens. Methods: For phytocompounds and chemical elements screening, seaweeds samples were dried, ground to powder and extracted using methanol as solvent. The analyses were performed using GC-MS analysis, Energy Dispersive X-ray Fluorescence, and colorimetric protocols for phytocompound analysis. Results: A total of 82 phytocompounds were identified. Phytol and Z-8-Methyl-9-tetradecenoic were present in all samples analysed, while Cetene, 9-Octadecenoic acid (Z)-methyl ester, Desmoterol, Octadecanoic acid, and Oleic acid were the less common phytocompound identified. Campesterol, gama-Sitoesterol, Cholest-5-en-ol, 24-propylidene-(3.beta) are phytosterols only identified in green seaweeds. The concentration of chemical elements among the seaweeds species was different. However, Ca, Cl and K were presented in high concentration in some of the seaweeds analysed. Conclusion: Overall, the seaweeds analysed in this study, seems to be good candidate for further biotechnological application and deserve further investigation. Keywords: seaweeds, methanolic extracts, phytocompounds, minerals, Inhaca Island.

Introduction: Phytocompounds are a powerful chemical group obtained from natural resources that exhibit a range of biological activities. Objective: This study explored the phytocompounds constituents of two species of Rhodophyta, Liagora divaricata and Trematocarpus flabellatus in order to give a preliminary view of qualitative diversity of potentially bioactive compounds. Methods: Approximately 200g of each species were hand-picked at in Chongoene, Mozambique, during a low spring tide. Voucher specimens were identified and stored at the LMU herbarium in the Department of Biological Science, University of Eduardo Mondlane. Samples were cleaned and dried at 50°C for 72 hours before grounding using an electric mixer. Powdered samples were extracted with methanol solvent. Phytocompounds samples were analysed using the GC-MS and identified based in NIST mass spectral library. Results: A total of 42 phytocompounds were identified. The common identities from both seaweeds species include Cholesterol, Desmosterol, Heptadecane, Hexadecanoic acid methyl ester, n-Hexadecanoic acid, Neophytadiene and Phytol. Conclusion: Due to the relevance of these phytocompounds in different industries such as pharmacy, nutrition, agriculture and cosmetic, the identified seaweeds might be good candidates for further research in terms of isolating and validating their activity. Particular attention should focus on Neophytadiene due to its strong bioactive compound in several applications. Keywords: Phytocompounds, Liagora divaricata, Trematocarpus flabellatus, Neophytadiene

Urinary calculi, also known as urinary stones, precipitates or urolithiasis, result from the aggregation and crystallization of minerals in the urinary system (Bazin et al., 2007;Senzaki et al., 2004).The presence of urinary calculi has been reported from larvae of various marine fish species, including brown-marbled grouper