For all that and taking reference on previous investigations, carried out some biological and analytical investigations on crustacean species, both coastal and deep-sea as Palaemon elegans, Plesionika narval, Plesionika edwarsii and Heterocarpus ensifer in the Canary Islands (Bryan 1968; Sanz 1987; White and Rainbow 1982, 1986), the aim of this study were to examine and compare the levels of Fe, Cu, Co, Zn, Ni and V in P. Elegans (Rathke 1837), Palaemon adpersus (Rathke 1837) and Palaemon serratus (Pennant 1777), from Canarian sea-waters.