The Australian blacktip shark is one of the two most abundant shark species in commercial gill-net catches off northern Australia . Black markings on the tips of both dorsal fins, and the pectoral and lower caudal fins distinguish C. tilstoni from most similar tropical whaler sharks . Even though often mistaken with the common blacktip shark - C. Limbatus, C. tilstoni is endemic to Australia, know form only one stock in northern Australia. It is commercially important in the NAGSF. This species is not considered dangerous for humans.