Arnold Schwarzenegger's son Joseph Baena rings in his 26th birthday with video of him in Speedo at the beach

Joseph Baena Channels Dad Arnold Schwarzenegger During Triathlon

Arnold Schwarzenegger's son Joseph Baena rips off his shirt and flexes his muscles as he exercises during Tropical Storm Hilary

Joseph Baena strikes one of his dad Arnold Schwarzenegger's classic bodybuilder poses while shirtless at the beach