It is, indeed, Shark Week.

While the Discovery Channel's weeklong shark-centric programming doesn't get underway until Sunday, Greg Norman's daughter Morgan-Leigh and her husband Chris Dillavou welcomed their first son into the world earlier this week.

Grandfather Shark posted this photo to Twitter on Saturday, excited for what he calls a "new chapter" in life:

Spending the day with my first grandson. A beautiful new chapter in life has begun. Thank u @MorganLNorman & Chris. pic.twitter.com/3PnhBrdF1Z

— Greg Norman (@SharkGregNorman) August 9, 2014