Cellular migration is a normal part of the normal development of the human being and, in certain pathologies, its alteration damages physiological performance, so that it is necessary to leam about its molecular and cellular foundations and establish methodologies to identify those molecules that modulate this cellular behavior. A screening method using zebra fish embryos is used to follow the advance in the migration of the lateral line primordium upon contact with a test compound. Modulators found are Fenritinide, PGD2 and is-deoxy-PJE2. The invention refers to a biological method for the IN VIVO, fast, massive and simultaneous tracking of molecules capable of affecting cellular migration, in order to facilitate the finding of potential candidates to be used in the diagnosis, prevention, and, principally, for the preparation of pharmaceutical compositions for the treatment of congenital pathologies, immune system dysfunctions, tissue regeneration failure, inflammation, cancer.