Public administrations with powers in coastal management are trying to solve the problem of regression of beaches with successive regenerations, acts that provoke social protest in the Balearic Islands. The studies of environmental impact that tend to accompany these activities are very vague regarding the effect of moving vast quantities of sand on animal communities and the functioning of the ecosystem of beaches, limiting themselves generally to recommending that communities of the spermatophyte marine plant Posidonia oceanica during the process of regeneration without taking into account other biological and ecological factors. Supra-benthonic crustaceans (isopods, amphipods, mysidacea, cumacea, copepods, calanoida, etc.) constitute the preponderant populations in sandy beaches.

This project aims to approach a description of the fauna and ecology of two non-regenerated beaches in the Balearic Islands (Es Trenc and Sa Canova) over one year based on the communities of these organisms.