Pedzisa mutsara unotevera:
Kudonha kwemafuta muGulf of Mexico kwakaguma nokuyerera kwemafuta kunharaunda iri kumaodzanyemba kweMississippi River Delta, uko chikamu chimwe muzvitatu chezviitiko zvose zvegoronga remhembwe kuchamhembe kwegungwa racho chakaitika mumakore achangobva kupfuura. Zvakaonekwa zvakaratidza kuti whale shark dzakanga dzisingakwanisi kunzvenga nzvimbo ine mafuta, iyo yaiva pamusoro pegungwa umo whale shark dzinodyira kwemaawa anoverengeka panguva imwe chete. Hapana whale shark yakafa yakawanikwa.