Great White Shark "urination"?

[Down2bizDiver]

Do Great White Sharks actually urinate? Unlike other sharks that excrete via gills? If not urination, or similar, what is happening at the 5:52 mark of this video? Clearly there is some sort of discharge.
Solmar V - Great White Shark Encounter - Isla Guadalupe - YouTube

 

[fisheater]

I think that's defecation, nor urination.

But I'm not a ichthyologist.