Marty Cerven
Contributor
Marty this is off Rottnest Island in Perth, definitely one of my favourite local dives, the sharks are magnificent. Site is called West Patch/Shark Cave there are several other vids on Youtube. Look for DMJB65's vids, he was with me that dive too. It's not unheard of for there to be 10-20 GNS in there. Can't wait to go back, its a very weather dependent dive and conditions were great last week so I was very fortunate to get there with my new Hero3.
I didnt know they had many Grey Nurse sharks on the west coast too, I have only dived east coast so far and love any site with lots of GN sharks and thats why my favorite site is the Fish rock cave at South West rocks NSW. WA is on my hope to go to soon list too