Abalone farms in South Africa have been suffering from mortalities due to toxins from harmful algal blooms. Yet, it has been shown that some individuals are more tolerant to the toxins, and that this might have a genetic basis. In this project, we want to scan the genomes (GWAS) of suceptible and tolerant individuals to find the loci associated with tolerance. These putative adaptive loci will then be targets of breeding efforts and tolerance experiments, in order to functionally validate the genomic hypotheses.