The white sucker is not primarily fished for food, though some consider it good to eat. When it is eaten by humans, it is usually processed and sold under the name of mullet.
|[white sucker (Catostomus commersonii)]|
The level of divergence in protein sequences between WSHBV other hepadnaviruses, and the identification of an Hepatitis B Virus-like sequence in an African cichlid, Ophthalmotilapia ventralis. provide evidence that a novel genus of the family Hepadnaviridae may need to be established that includes these Hepatitis B-like viruses in fishes.
|[African cichlid, Ophthalmotilapia ventralis]|
Suddenly there's an entirely new reservoir of the elusive Hepatitis B Viruses. It may be some time before research may find other fishy hosts. Iwanowicz, one of the researchers, told me that 'these viruses are genetically very different from those that infect humans or birds, and they are not likely a risk to humans. This virus is missing the X-protein that is associated with tumor induction in the HBVs that infect mammals. These viruses are so different that we are in the process of proposing an new genus altogether. They are likely one more snap shot of HBV evolutions'.
Thus, Hepatitis B viruses in birds (avian) and mammals (mammalian) might soon have company from a new family of Hepatitis B viruses in fishes (piscinian).
 Hahn et al: Characterization of a Novel Hepadnavirus in the White Sucker (Catostomus commersonii) from the Great Lakes Region of the USA in Journal of Virology - 2015
 Personal communication with Luke Iwanowicz: 'We did scour publicly available gene databases and found a sequence for a hepatitis b-like protein in an African cichlid, Ophthalmotilapia ventralis'.