Preliminary results of a study by the University of Murcia show the presence of antibiotics and anti-inflammatories in cetaceans. Ibuprofen is the most detected active ingredient, followed by azithromycin.

Marfarisk is a pioneering study on these species that is being carried out at the Faculty of Veterinary Medicine in Murcia. The findings would confirm in some way how difficult it is to "put doors to the sea" Although the EU does not allow marine crops to be treated with antibiotics, other countries like China continue to do so.