http://www.seaslugsofhawaii.com/species/Diacria-costata-a.html
http://species-identification.org/species.php?species_group=Pelagic_molluscs&selected=beschrijving&menuentry=soorten&record=Diacria%20costata
http://species-identification.org/species.php?species_group=pelagic_molluscs&menuentry=soorten&id=235